1638697840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{38431}}^1$

素因数の和:38498

約数の個数: 80

約数和(自身を含む): 4203230976

約数和(自身を除く): 2564533136

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, 520, 533, 656, 820, 1040, 1066, 1640, 2132, 2665, 3280, 4264, 5330, 8528, 10660, 21320, 38431, 42640, 76862, 153724, 192155, 307448, 384310, 499603, 614896, 768620, 999206, 1537240, 1575671, 1998412, 2498015, 3074480, 3151342, 3996824, 4996030, 6302684, 7878355, 7993648, 9992060, 12605368, 15756710, 19984120, 20483723, 25210736, 31513420, 39968240, 40967446, 63026840, 81934892, 102418615, 126053680, 163869784, 204837230, 327739568, 409674460, 819348920, 1638697840]

約数ペア:

[(1, 1638697840), (2, 819348920), (4, 409674460), (5, 327739568), (8, 204837230), (10, 163869784), (13, 126053680), (16, 102418615), (20, 81934892), (26, 63026840), (40, 40967446), (41, 39968240), (52, 31513420), (65, 25210736), (80, 20483723), (82, 19984120), (104, 15756710), (130, 12605368), (164, 9992060), (205, 7993648), (208, 7878355), (260, 6302684), (328, 4996030), (410, 3996824), (520, 3151342), (533, 3074480), (656, 2498015), (820, 1998412), (1040, 1575671), (1066, 1537240), (1640, 999206), (2132, 768620), (2665, 614896), (3280, 499603), (4264, 384310), (5330, 307448), (8528, 192155), (10660, 153724), (21320, 76862), (38431, 42640)]