21161964

素因数分解:

$2^2\times 3^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1\times {\mathrm{349}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 51430400

約数和(自身を除く): 30268436

約数列:

[1, 2, 3, 4, 6, 12, 31, 62, 93, 124, 163, 186, 326, 349, 372, 489, 652, 698, 978, 1047, 1396, 1956, 2094, 4188, 5053, 10106, 10819, 15159, 20212, 21638, 30318, 32457, 43276, 56887, 60636, 64914, 113774, 129828, 170661, 227548, 341322, 682644, 1763497, 3526994, 5290491, 7053988, 10580982, 21161964]

約数ペア:

[(1, 21161964), (2, 10580982), (3, 7053988), (4, 5290491), (6, 3526994), (12, 1763497), (31, 682644), (62, 341322), (93, 227548), (124, 170661), (163, 129828), (186, 113774), (326, 64914), (349, 60636), (372, 56887), (489, 43276), (652, 32457), (698, 30318), (978, 21638), (1047, 20212), (1396, 15159), (1956, 10819), (2094, 10106), (4188, 5053)]