20292560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:420

約数の個数: 80

約数和(自身を含む): 51264576

約数和(自身を除く): 30972016

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 43, 68, 80, 85, 86, 136, 170, 172, 215, 272, 340, 344, 347, 430, 680, 688, 694, 731, 860, 1360, 1388, 1462, 1720, 1735, 2776, 2924, 3440, 3470, 3655, 5552, 5848, 5899, 6940, 7310, 11696, 11798, 13880, 14620, 14921, 23596, 27760, 29240, 29495, 29842, 47192, 58480, 58990, 59684, 74605, 94384, 117980, 119368, 149210, 235960, 238736, 253657, 298420, 471920, 507314, 596840, 1014628, 1193680, 1268285, 2029256, 2536570, 4058512, 5073140, 10146280, 20292560]

約数ペア:

[(1, 20292560), (2, 10146280), (4, 5073140), (5, 4058512), (8, 2536570), (10, 2029256), (16, 1268285), (17, 1193680), (20, 1014628), (34, 596840), (40, 507314), (43, 471920), (68, 298420), (80, 253657), (85, 238736), (86, 235960), (136, 149210), (170, 119368), (172, 117980), (215, 94384), (272, 74605), (340, 59684), (344, 58990), (347, 58480), (430, 47192), (680, 29842), (688, 29495), (694, 29240), (731, 27760), (860, 23596), (1360, 14921), (1388, 14620), (1462, 13880), (1720, 11798), (1735, 11696), (2776, 7310), (2924, 6940), (3440, 5899), (3470, 5848), (3655, 5552)]