21918680

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{211}}^1$

素因数の和:289

約数の個数: 96

約数和(自身を含む): 58728240

約数和(自身を除く): 36809560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 53, 56, 70, 98, 106, 140, 196, 211, 212, 245, 265, 280, 371, 392, 422, 424, 490, 530, 742, 844, 980, 1055, 1060, 1477, 1484, 1688, 1855, 1960, 2110, 2120, 2597, 2954, 2968, 3710, 4220, 5194, 5908, 7385, 7420, 8440, 10339, 10388, 11183, 11816, 12985, 14770, 14840, 20678, 20776, 22366, 25970, 29540, 41356, 44732, 51695, 51940, 55915, 59080, 78281, 82712, 89464, 103390, 103880, 111830, 156562, 206780, 223660, 313124, 391405, 413560, 447320, 547967, 626248, 782810, 1095934, 1565620, 2191868, 2739835, 3131240, 4383736, 5479670, 10959340, 21918680]

約数ペア:

[(1, 21918680), (2, 10959340), (4, 5479670), (5, 4383736), (7, 3131240), (8, 2739835), (10, 2191868), (14, 1565620), (20, 1095934), (28, 782810), (35, 626248), (40, 547967), (49, 447320), (53, 413560), (56, 391405), (70, 313124), (98, 223660), (106, 206780), (140, 156562), (196, 111830), (211, 103880), (212, 103390), (245, 89464), (265, 82712), (280, 78281), (371, 59080), (392, 55915), (422, 51940), (424, 51695), (490, 44732), (530, 41356), (742, 29540), (844, 25970), (980, 22366), (1055, 20776), (1060, 20678), (1477, 14840), (1484, 14770), (1688, 12985), (1855, 11816), (1960, 11183), (2110, 10388), (2120, 10339), (2597, 8440), (2954, 7420), (2968, 7385), (3710, 5908), (4220, 5194)]