19181440

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:120

約数の個数: 128

約数和(自身を含む): 50893920

約数和(自身を除く): 31712480

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 41, 43, 64, 68, 80, 82, 85, 86, 128, 136, 160, 164, 170, 172, 205, 215, 272, 320, 328, 340, 344, 410, 430, 544, 640, 656, 680, 688, 697, 731, 820, 860, 1088, 1312, 1360, 1376, 1394, 1462, 1640, 1720, 1763, 2176, 2624, 2720, 2752, 2788, 2924, 3280, 3440, 3485, 3526, 3655, 5248, 5440, 5504, 5576, 5848, 6560, 6880, 6970, 7052, 7310, 8815, 10880, 11152, 11696, 13120, 13760, 13940, 14104, 14620, 17630, 22304, 23392, 26240, 27520, 27880, 28208, 29240, 29971, 35260, 44608, 46784, 55760, 56416, 58480, 59942, 70520, 89216, 93568, 111520, 112832, 116960, 119884, 141040, 149855, 223040, 225664, 233920, 239768, 282080, 299710, 446080, 467840, 479536, 564160, 599420, 959072, 1128320, 1198840, 1918144, 2397680, 3836288, 4795360, 9590720, 19181440]

約数ペア:

[(1, 19181440), (2, 9590720), (4, 4795360), (5, 3836288), (8, 2397680), (10, 1918144), (16, 1198840), (17, 1128320), (20, 959072), (32, 599420), (34, 564160), (40, 479536), (41, 467840), (43, 446080), (64, 299710), (68, 282080), (80, 239768), (82, 233920), (85, 225664), (86, 223040), (128, 149855), (136, 141040), (160, 119884), (164, 116960), (170, 112832), (172, 111520), (205, 93568), (215, 89216), (272, 70520), (320, 59942), (328, 58480), (340, 56416), (344, 55760), (410, 46784), (430, 44608), (544, 35260), (640, 29971), (656, 29240), (680, 28208), (688, 27880), (697, 27520), (731, 26240), (820, 23392), (860, 22304), (1088, 17630), (1312, 14620), (1360, 14104), (1376, 13940), (1394, 13760), (1462, 13120), (1640, 11696), (1720, 11152), (1763, 10880), (2176, 8815), (2624, 7310), (2720, 7052), (2752, 6970), (2788, 6880), (2924, 6560), (3280, 5848), (3440, 5576), (3485, 5504), (3526, 5440), (3655, 5248)]