21036460

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{401}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 46059552

約数和(自身を除く): 25023092

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 401, 430, 610, 802, 860, 1220, 1604, 2005, 2623, 4010, 5246, 8020, 10492, 13115, 17243, 24461, 26230, 34486, 48922, 52460, 68972, 86215, 97844, 122305, 172430, 244610, 344860, 489220, 1051823, 2103646, 4207292, 5259115, 10518230, 21036460]

約数ペア:

[(1, 21036460), (2, 10518230), (4, 5259115), (5, 4207292), (10, 2103646), (20, 1051823), (43, 489220), (61, 344860), (86, 244610), (122, 172430), (172, 122305), (215, 97844), (244, 86215), (305, 68972), (401, 52460), (430, 48922), (610, 34486), (802, 26230), (860, 24461), (1220, 17243), (1604, 13115), (2005, 10492), (2623, 8020), (4010, 5246)]