21017880

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:535

約数の個数: 160

約数和(自身を含む): 76230000

約数和(自身を除く): 55212120

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 52, 54, 60, 65, 72, 78, 81, 90, 104, 108, 117, 120, 130, 135, 156, 162, 180, 195, 216, 234, 260, 270, 312, 324, 351, 360, 390, 405, 468, 499, 520, 540, 585, 648, 702, 780, 810, 936, 998, 1053, 1080, 1170, 1404, 1497, 1560, 1620, 1755, 1996, 2106, 2340, 2495, 2808, 2994, 3240, 3510, 3992, 4212, 4491, 4680, 4990, 5265, 5988, 6487, 7020, 7485, 8424, 8982, 9980, 10530, 11976, 12974, 13473, 14040, 14970, 17964, 19461, 19960, 21060, 22455, 25948, 26946, 29940, 32435, 35928, 38922, 40419, 42120, 44910, 51896, 53892, 58383, 59880, 64870, 67365, 77844, 80838, 89820, 97305, 107784, 116766, 129740, 134730, 155688, 161676, 175149, 179640, 194610, 202095, 233532, 259480, 269460, 291915, 323352, 350298, 389220, 404190, 467064, 525447, 538920, 583830, 700596, 778440, 808380, 875745, 1050894, 1167660, 1401192, 1616760, 1751490, 2101788, 2335320, 2627235, 3502980, 4203576, 5254470, 7005960, 10508940, 21017880]

約数ペア:

[(1, 21017880), (2, 10508940), (3, 7005960), (4, 5254470), (5, 4203576), (6, 3502980), (8, 2627235), (9, 2335320), (10, 2101788), (12, 1751490), (13, 1616760), (15, 1401192), (18, 1167660), (20, 1050894), (24, 875745), (26, 808380), (27, 778440), (30, 700596), (36, 583830), (39, 538920), (40, 525447), (45, 467064), (52, 404190), (54, 389220), (60, 350298), (65, 323352), (72, 291915), (78, 269460), (81, 259480), (90, 233532), (104, 202095), (108, 194610), (117, 179640), (120, 175149), (130, 161676), (135, 155688), (156, 134730), (162, 129740), (180, 116766), (195, 107784), (216, 97305), (234, 89820), (260, 80838), (270, 77844), (312, 67365), (324, 64870), (351, 59880), (360, 58383), (390, 53892), (405, 51896), (468, 44910), (499, 42120), (520, 40419), (540, 38922), (585, 35928), (648, 32435), (702, 29940), (780, 26946), (810, 25948), (936, 22455), (998, 21060), (1053, 19960), (1080, 19461), (1170, 17964), (1404, 14970), (1497, 14040), (1560, 13473), (1620, 12974), (1755, 11976), (1996, 10530), (2106, 9980), (2340, 8982), (2495, 8424), (2808, 7485), (2994, 7020), (3240, 6487), (3510, 5988), (3992, 5265), (4212, 4990), (4491, 4680)]