21497860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{1193}}^1$

素因数の和:1272

約数の個数: 48

約数和(自身を含む): 48743856

約数和(自身を除く): 27245996

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 53, 68, 85, 106, 170, 212, 265, 340, 530, 901, 1060, 1193, 1802, 2386, 3604, 4505, 4772, 5965, 9010, 11930, 18020, 20281, 23860, 40562, 63229, 81124, 101405, 126458, 202810, 252916, 316145, 405620, 632290, 1074893, 1264580, 2149786, 4299572, 5374465, 10748930, 21497860]

約数ペア:

[(1, 21497860), (2, 10748930), (4, 5374465), (5, 4299572), (10, 2149786), (17, 1264580), (20, 1074893), (34, 632290), (53, 405620), (68, 316145), (85, 252916), (106, 202810), (170, 126458), (212, 101405), (265, 81124), (340, 63229), (530, 40562), (901, 23860), (1060, 20281), (1193, 18020), (1802, 11930), (2386, 9010), (3604, 5965), (4505, 4772)]