20281000

素因数分解:

$2^3\times 5^3\times {\mathrm{17}}^1\times {\mathrm{1193}}^1$

素因数の和:1231

約数の個数: 64

約数和(自身を含む): 50291280

約数和(自身を除く): 30010280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 25, 34, 40, 50, 68, 85, 100, 125, 136, 170, 200, 250, 340, 425, 500, 680, 850, 1000, 1193, 1700, 2125, 2386, 3400, 4250, 4772, 5965, 8500, 9544, 11930, 17000, 20281, 23860, 29825, 40562, 47720, 59650, 81124, 101405, 119300, 149125, 162248, 202810, 238600, 298250, 405620, 507025, 596500, 811240, 1014050, 1193000, 2028100, 2535125, 4056200, 5070250, 10140500, 20281000]

約数ペア:

[(1, 20281000), (2, 10140500), (4, 5070250), (5, 4056200), (8, 2535125), (10, 2028100), (17, 1193000), (20, 1014050), (25, 811240), (34, 596500), (40, 507025), (50, 405620), (68, 298250), (85, 238600), (100, 202810), (125, 162248), (136, 149125), (170, 119300), (200, 101405), (250, 81124), (340, 59650), (425, 47720), (500, 40562), (680, 29825), (850, 23860), (1000, 20281), (1193, 17000), (1700, 11930), (2125, 9544), (2386, 8500), (3400, 5965), (4250, 4772)]