21996908

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:246

約数の個数: 48

約数和(自身を含む): 42577920

約数和(自身を除く): 20581012

約数列:

[1, 2, 4, 19, 38, 43, 53, 76, 86, 106, 127, 172, 212, 254, 508, 817, 1007, 1634, 2014, 2279, 2413, 3268, 4028, 4558, 4826, 5461, 6731, 9116, 9652, 10922, 13462, 21844, 26924, 43301, 86602, 103759, 127889, 173204, 207518, 255778, 289433, 415036, 511556, 578866, 1157732, 5499227, 10998454, 21996908]

約数ペア:

[(1, 21996908), (2, 10998454), (4, 5499227), (19, 1157732), (38, 578866), (43, 511556), (53, 415036), (76, 289433), (86, 255778), (106, 207518), (127, 173204), (172, 127889), (212, 103759), (254, 86602), (508, 43301), (817, 26924), (1007, 21844), (1634, 13462), (2014, 10922), (2279, 9652), (2413, 9116), (3268, 6731), (4028, 5461), (4558, 4826)]