19912880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{467}}^1$

素因数の和:534

約数の個数: 80

約数和(自身を含む): 51184224

約数和(自身を除く): 31271344

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 467, 520, 533, 656, 820, 934, 1040, 1066, 1640, 1868, 2132, 2335, 2665, 3280, 3736, 4264, 4670, 5330, 6071, 7472, 8528, 9340, 10660, 12142, 18680, 19147, 21320, 24284, 30355, 37360, 38294, 42640, 48568, 60710, 76588, 95735, 97136, 121420, 153176, 191470, 242840, 248911, 306352, 382940, 485680, 497822, 765880, 995644, 1244555, 1531760, 1991288, 2489110, 3982576, 4978220, 9956440, 19912880]

約数ペア:

[(1, 19912880), (2, 9956440), (4, 4978220), (5, 3982576), (8, 2489110), (10, 1991288), (13, 1531760), (16, 1244555), (20, 995644), (26, 765880), (40, 497822), (41, 485680), (52, 382940), (65, 306352), (80, 248911), (82, 242840), (104, 191470), (130, 153176), (164, 121420), (205, 97136), (208, 95735), (260, 76588), (328, 60710), (410, 48568), (467, 42640), (520, 38294), (533, 37360), (656, 30355), (820, 24284), (934, 21320), (1040, 19147), (1066, 18680), (1640, 12142), (1868, 10660), (2132, 9340), (2335, 8528), (2665, 7472), (3280, 6071), (3736, 5330), (4264, 4670)]