19456840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 128

約数和(自身を含む): 52254720

約数和(自身を除く): 32797880

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 31, 34, 40, 52, 62, 65, 68, 71, 85, 104, 124, 130, 136, 142, 155, 170, 221, 248, 260, 284, 310, 340, 355, 403, 442, 520, 527, 568, 620, 680, 710, 806, 884, 923, 1054, 1105, 1207, 1240, 1420, 1612, 1768, 1846, 2015, 2108, 2201, 2210, 2414, 2635, 2840, 3224, 3692, 4030, 4216, 4402, 4420, 4615, 4828, 5270, 6035, 6851, 7384, 8060, 8804, 8840, 9230, 9656, 10540, 11005, 12070, 13702, 15691, 16120, 17608, 18460, 21080, 22010, 24140, 27404, 28613, 31382, 34255, 36920, 37417, 44020, 48280, 54808, 57226, 62764, 68510, 74834, 78455, 88040, 114452, 125528, 137020, 143065, 149668, 156910, 187085, 228904, 274040, 286130, 299336, 313820, 374170, 486421, 572260, 627640, 748340, 972842, 1144520, 1496680, 1945684, 2432105, 3891368, 4864210, 9728420, 19456840]

約数ペア:

[(1, 19456840), (2, 9728420), (4, 4864210), (5, 3891368), (8, 2432105), (10, 1945684), (13, 1496680), (17, 1144520), (20, 972842), (26, 748340), (31, 627640), (34, 572260), (40, 486421), (52, 374170), (62, 313820), (65, 299336), (68, 286130), (71, 274040), (85, 228904), (104, 187085), (124, 156910), (130, 149668), (136, 143065), (142, 137020), (155, 125528), (170, 114452), (221, 88040), (248, 78455), (260, 74834), (284, 68510), (310, 62764), (340, 57226), (355, 54808), (403, 48280), (442, 44020), (520, 37417), (527, 36920), (568, 34255), (620, 31382), (680, 28613), (710, 27404), (806, 24140), (884, 22010), (923, 21080), (1054, 18460), (1105, 17608), (1207, 16120), (1240, 15691), (1420, 13702), (1612, 12070), (1768, 11005), (1846, 10540), (2015, 9656), (2108, 9230), (2201, 8840), (2210, 8804), (2414, 8060), (2635, 7384), (2840, 6851), (3224, 6035), (3692, 5270), (4030, 4828), (4216, 4615), (4402, 4420)]