21388716

素因数分解:

$2^2\times 3^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{337}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 56840784

約数和(自身を除く): 35452068

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 41, 43, 82, 86, 123, 129, 164, 172, 246, 258, 337, 369, 387, 492, 516, 674, 738, 774, 1011, 1348, 1476, 1548, 1763, 2022, 3033, 3526, 4044, 5289, 6066, 7052, 10578, 12132, 13817, 14491, 15867, 21156, 27634, 28982, 31734, 41451, 43473, 55268, 57964, 63468, 82902, 86946, 124353, 130419, 165804, 173892, 248706, 260838, 497412, 521676, 594131, 1188262, 1782393, 2376524, 3564786, 5347179, 7129572, 10694358, 21388716]

約数ペア:

[(1, 21388716), (2, 10694358), (3, 7129572), (4, 5347179), (6, 3564786), (9, 2376524), (12, 1782393), (18, 1188262), (36, 594131), (41, 521676), (43, 497412), (82, 260838), (86, 248706), (123, 173892), (129, 165804), (164, 130419), (172, 124353), (246, 86946), (258, 82902), (337, 63468), (369, 57964), (387, 55268), (492, 43473), (516, 41451), (674, 31734), (738, 28982), (774, 27634), (1011, 21156), (1348, 15867), (1476, 14491), (1548, 13817), (1763, 12132), (2022, 10578), (3033, 7052), (3526, 6066), (4044, 5289)]