21431340

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{233}}^1$

素因数の和:328

約数の個数: 144

約数和(自身を含む): 75636288

約数和(自身を除く): 54204948

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, 73, 84, 90, 105, 126, 140, 146, 180, 210, 219, 233, 252, 292, 315, 365, 420, 438, 466, 511, 630, 657, 699, 730, 876, 932, 1022, 1095, 1165, 1260, 1314, 1398, 1460, 1533, 1631, 2044, 2097, 2190, 2330, 2555, 2628, 2796, 3066, 3262, 3285, 3495, 4194, 4380, 4599, 4660, 4893, 5110, 6132, 6524, 6570, 6990, 7665, 8155, 8388, 9198, 9786, 10220, 10485, 13140, 13980, 14679, 15330, 16310, 17009, 18396, 19572, 20970, 22995, 24465, 29358, 30660, 32620, 34018, 41940, 45990, 48930, 51027, 58716, 68036, 73395, 85045, 91980, 97860, 102054, 119063, 146790, 153081, 170090, 204108, 238126, 255135, 293580, 306162, 340180, 357189, 476252, 510270, 595315, 612324, 714378, 765405, 1020540, 1071567, 1190630, 1428756, 1530810, 1785945, 2143134, 2381260, 3061620, 3571890, 4286268, 5357835, 7143780, 10715670, 21431340]

約数ペア:

[(1, 21431340), (2, 10715670), (3, 7143780), (4, 5357835), (5, 4286268), (6, 3571890), (7, 3061620), (9, 2381260), (10, 2143134), (12, 1785945), (14, 1530810), (15, 1428756), (18, 1190630), (20, 1071567), (21, 1020540), (28, 765405), (30, 714378), (35, 612324), (36, 595315), (42, 510270), (45, 476252), (60, 357189), (63, 340180), (70, 306162), (73, 293580), (84, 255135), (90, 238126), (105, 204108), (126, 170090), (140, 153081), (146, 146790), (180, 119063), (210, 102054), (219, 97860), (233, 91980), (252, 85045), (292, 73395), (315, 68036), (365, 58716), (420, 51027), (438, 48930), (466, 45990), (511, 41940), (630, 34018), (657, 32620), (699, 30660), (730, 29358), (876, 24465), (932, 22995), (1022, 20970), (1095, 19572), (1165, 18396), (1260, 17009), (1314, 16310), (1398, 15330), (1460, 14679), (1533, 13980), (1631, 13140), (2044, 10485), (2097, 10220), (2190, 9786), (2330, 9198), (2555, 8388), (2628, 8155), (2796, 7665), (3066, 6990), (3262, 6570), (3285, 6524), (3495, 6132), (4194, 5110), (4380, 4893), (4599, 4660)]