81608940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{271}}^1$

素因数の和:532

約数の個数: 144

約数和(自身を含む): 285143040

約数和(自身を除く): 203534100

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 239, 252, 271, 315, 420, 478, 542, 630, 717, 813, 956, 1084, 1195, 1260, 1355, 1434, 1626, 1673, 1897, 2151, 2390, 2439, 2710, 2868, 3252, 3346, 3585, 3794, 4065, 4302, 4780, 4878, 5019, 5420, 5691, 6692, 7170, 7588, 8130, 8365, 8604, 9485, 9756, 10038, 10755, 11382, 12195, 14340, 15057, 16260, 16730, 17073, 18970, 20076, 21510, 22764, 24390, 25095, 28455, 30114, 33460, 34146, 37940, 43020, 48780, 50190, 56910, 60228, 64769, 68292, 75285, 85365, 100380, 113820, 129538, 150570, 170730, 194307, 259076, 301140, 323845, 341460, 388614, 453383, 582921, 647690, 777228, 906766, 971535, 1165842, 1295380, 1360149, 1813532, 1943070, 2266915, 2331684, 2720298, 2914605, 3886140, 4080447, 4533830, 5440596, 5829210, 6800745, 8160894, 9067660, 11658420, 13601490, 16321788, 20402235, 27202980, 40804470, 81608940]

約数ペア:

[(1, 81608940), (2, 40804470), (3, 27202980), (4, 20402235), (5, 16321788), (6, 13601490), (7, 11658420), (9, 9067660), (10, 8160894), (12, 6800745), (14, 5829210), (15, 5440596), (18, 4533830), (20, 4080447), (21, 3886140), (28, 2914605), (30, 2720298), (35, 2331684), (36, 2266915), (42, 1943070), (45, 1813532), (60, 1360149), (63, 1295380), (70, 1165842), (84, 971535), (90, 906766), (105, 777228), (126, 647690), (140, 582921), (180, 453383), (210, 388614), (239, 341460), (252, 323845), (271, 301140), (315, 259076), (420, 194307), (478, 170730), (542, 150570), (630, 129538), (717, 113820), (813, 100380), (956, 85365), (1084, 75285), (1195, 68292), (1260, 64769), (1355, 60228), (1434, 56910), (1626, 50190), (1673, 48780), (1897, 43020), (2151, 37940), (2390, 34146), (2439, 33460), (2710, 30114), (2868, 28455), (3252, 25095), (3346, 24390), (3585, 22764), (3794, 21510), (4065, 20076), (4302, 18970), (4780, 17073), (4878, 16730), (5019, 16260), (5420, 15057), (5691, 14340), (6692, 12195), (7170, 11382), (7588, 10755), (8130, 10038), (8365, 9756), (8604, 9485)]