18971820

素因数分解:

$2^2\times 3^4\times 5^1\times 7^2\times {\mathrm{239}}^1$

素因数の和:274

約数の個数: 180

約数和(自身を含む): 69521760

約数和(自身を除く): 50549940

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 49, 54, 60, 63, 70, 81, 84, 90, 98, 105, 108, 126, 135, 140, 147, 162, 180, 189, 196, 210, 239, 245, 252, 270, 294, 315, 324, 378, 405, 420, 441, 478, 490, 540, 567, 588, 630, 717, 735, 756, 810, 882, 945, 956, 980, 1134, 1195, 1260, 1323, 1434, 1470, 1620, 1673, 1764, 1890, 2151, 2205, 2268, 2390, 2646, 2835, 2868, 2940, 3346, 3585, 3780, 3969, 4302, 4410, 4780, 5019, 5292, 5670, 6453, 6615, 6692, 7170, 7938, 8365, 8604, 8820, 10038, 10755, 11340, 11711, 12906, 13230, 14340, 15057, 15876, 16730, 19359, 19845, 20076, 21510, 23422, 25095, 25812, 26460, 30114, 32265, 33460, 35133, 38718, 39690, 43020, 45171, 46844, 50190, 58555, 60228, 64530, 70266, 75285, 77436, 79380, 90342, 96795, 100380, 105399, 117110, 129060, 135513, 140532, 150570, 175665, 180684, 193590, 210798, 225855, 234220, 271026, 301140, 316197, 351330, 387180, 421596, 451710, 526995, 542052, 632394, 677565, 702660, 903420, 948591, 1053990, 1264788, 1355130, 1580985, 1897182, 2107980, 2710260, 3161970, 3794364, 4742955, 6323940, 9485910, 18971820]

約数ペア:

[(1, 18971820), (2, 9485910), (3, 6323940), (4, 4742955), (5, 3794364), (6, 3161970), (7, 2710260), (9, 2107980), (10, 1897182), (12, 1580985), (14, 1355130), (15, 1264788), (18, 1053990), (20, 948591), (21, 903420), (27, 702660), (28, 677565), (30, 632394), (35, 542052), (36, 526995), (42, 451710), (45, 421596), (49, 387180), (54, 351330), (60, 316197), (63, 301140), (70, 271026), (81, 234220), (84, 225855), (90, 210798), (98, 193590), (105, 180684), (108, 175665), (126, 150570), (135, 140532), (140, 135513), (147, 129060), (162, 117110), (180, 105399), (189, 100380), (196, 96795), (210, 90342), (239, 79380), (245, 77436), (252, 75285), (270, 70266), (294, 64530), (315, 60228), (324, 58555), (378, 50190), (405, 46844), (420, 45171), (441, 43020), (478, 39690), (490, 38718), (540, 35133), (567, 33460), (588, 32265), (630, 30114), (717, 26460), (735, 25812), (756, 25095), (810, 23422), (882, 21510), (945, 20076), (956, 19845), (980, 19359), (1134, 16730), (1195, 15876), (1260, 15057), (1323, 14340), (1434, 13230), (1470, 12906), (1620, 11711), (1673, 11340), (1764, 10755), (1890, 10038), (2151, 8820), (2205, 8604), (2268, 8365), (2390, 7938), (2646, 7170), (2835, 6692), (2868, 6615), (2940, 6453), (3346, 5670), (3585, 5292), (3780, 5019), (3969, 4780), (4302, 4410)]