890758900

素因数分解:

$2^2\times 5^2\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{1151}}^1$

素因数の和:1345

約数の個数: 72

約数和(自身を含む): 1979873280

約数和(自身を除く): 1089114380

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 109, 142, 218, 284, 355, 436, 545, 710, 1090, 1151, 1420, 1775, 2180, 2302, 2725, 3550, 4604, 5450, 5755, 7100, 7739, 10900, 11510, 15478, 23020, 28775, 30956, 38695, 57550, 77390, 81721, 115100, 125459, 154780, 163442, 193475, 250918, 326884, 386950, 408605, 501836, 627295, 773900, 817210, 1254590, 1634420, 2043025, 2509180, 3136475, 4086050, 6272950, 8172100, 8907589, 12545900, 17815178, 35630356, 44537945, 89075890, 178151780, 222689725, 445379450, 890758900]

約数ペア:

[(1, 890758900), (2, 445379450), (4, 222689725), (5, 178151780), (10, 89075890), (20, 44537945), (25, 35630356), (50, 17815178), (71, 12545900), (100, 8907589), (109, 8172100), (142, 6272950), (218, 4086050), (284, 3136475), (355, 2509180), (436, 2043025), (545, 1634420), (710, 1254590), (1090, 817210), (1151, 773900), (1420, 627295), (1775, 501836), (2180, 408605), (2302, 386950), (2725, 326884), (3550, 250918), (4604, 193475), (5450, 163442), (5755, 154780), (7100, 125459), (7739, 115100), (10900, 81721), (11510, 77390), (15478, 57550), (23020, 38695), (28775, 30956)]