81271840

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{953}}^1$

素因数の和:1022

約数の個数: 96

約数和(自身を含む): 212039856

約数和(自身を除く): 130768016

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 65, 80, 82, 104, 130, 160, 164, 205, 208, 260, 328, 410, 416, 520, 533, 656, 820, 953, 1040, 1066, 1312, 1640, 1906, 2080, 2132, 2665, 3280, 3812, 4264, 4765, 5330, 6560, 7624, 8528, 9530, 10660, 12389, 15248, 17056, 19060, 21320, 24778, 30496, 38120, 39073, 42640, 49556, 61945, 76240, 78146, 85280, 99112, 123890, 152480, 156292, 195365, 198224, 247780, 312584, 390730, 396448, 495560, 507949, 625168, 781460, 991120, 1015898, 1250336, 1562920, 1982240, 2031796, 2539745, 3125840, 4063592, 5079490, 6251680, 8127184, 10158980, 16254368, 20317960, 40635920, 81271840]

約数ペア:

[(1, 81271840), (2, 40635920), (4, 20317960), (5, 16254368), (8, 10158980), (10, 8127184), (13, 6251680), (16, 5079490), (20, 4063592), (26, 3125840), (32, 2539745), (40, 2031796), (41, 1982240), (52, 1562920), (65, 1250336), (80, 1015898), (82, 991120), (104, 781460), (130, 625168), (160, 507949), (164, 495560), (205, 396448), (208, 390730), (260, 312584), (328, 247780), (410, 198224), (416, 195365), (520, 156292), (533, 152480), (656, 123890), (820, 99112), (953, 85280), (1040, 78146), (1066, 76240), (1312, 61945), (1640, 49556), (1906, 42640), (2080, 39073), (2132, 38120), (2665, 30496), (3280, 24778), (3812, 21320), (4264, 19060), (4765, 17056), (5330, 15248), (6560, 12389), (7624, 10660), (8528, 9530)]