21681352

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{577}}^1$

素因数の和:662

約数の個数: 64

約数和(自身を含む): 51603840

約数和(自身を除く): 29922488

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 61, 77, 88, 122, 154, 244, 308, 427, 488, 577, 616, 671, 854, 1154, 1342, 1708, 2308, 2684, 3416, 4039, 4616, 4697, 5368, 6347, 8078, 9394, 12694, 16156, 18788, 25388, 32312, 35197, 37576, 44429, 50776, 70394, 88858, 140788, 177716, 246379, 281576, 355432, 387167, 492758, 774334, 985516, 1548668, 1971032, 2710169, 3097336, 5420338, 10840676, 21681352]

約数ペア:

[(1, 21681352), (2, 10840676), (4, 5420338), (7, 3097336), (8, 2710169), (11, 1971032), (14, 1548668), (22, 985516), (28, 774334), (44, 492758), (56, 387167), (61, 355432), (77, 281576), (88, 246379), (122, 177716), (154, 140788), (244, 88858), (308, 70394), (427, 50776), (488, 44429), (577, 37576), (616, 35197), (671, 32312), (854, 25388), (1154, 18788), (1342, 16156), (1708, 12694), (2308, 9394), (2684, 8078), (3416, 6347), (4039, 5368), (4616, 4697)]