21221848

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:244

約数の個数: 48

約数和(自身を含む): 43213320

約数和(自身を除く): 21991472

約数列:

[1, 2, 4, 8, 17, 34, 67, 68, 134, 136, 137, 268, 274, 289, 536, 548, 578, 1096, 1139, 1156, 2278, 2312, 2329, 4556, 4658, 9112, 9179, 9316, 18358, 18632, 19363, 36716, 38726, 39593, 73432, 77452, 79186, 154904, 156043, 158372, 312086, 316744, 624172, 1248344, 2652731, 5305462, 10610924, 21221848]

約数ペア:

[(1, 21221848), (2, 10610924), (4, 5305462), (8, 2652731), (17, 1248344), (34, 624172), (67, 316744), (68, 312086), (134, 158372), (136, 156043), (137, 154904), (268, 79186), (274, 77452), (289, 73432), (536, 39593), (548, 38726), (578, 36716), (1096, 19363), (1139, 18632), (1156, 18358), (2278, 9316), (2312, 9179), (2329, 9112), (4556, 4658)]