21380744

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 50889600

約数和(自身を除く): 29508856

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 56, 61, 77, 88, 122, 154, 244, 308, 427, 488, 569, 616, 671, 854, 1138, 1342, 1708, 2276, 2684, 3416, 3983, 4552, 4697, 5368, 6259, 7966, 9394, 12518, 15932, 18788, 25036, 31864, 34709, 37576, 43813, 50072, 69418, 87626, 138836, 175252, 242963, 277672, 350504, 381799, 485926, 763598, 971852, 1527196, 1943704, 2672593, 3054392, 5345186, 10690372, 21380744]

約数ペア:

[(1, 21380744), (2, 10690372), (4, 5345186), (7, 3054392), (8, 2672593), (11, 1943704), (14, 1527196), (22, 971852), (28, 763598), (44, 485926), (56, 381799), (61, 350504), (77, 277672), (88, 242963), (122, 175252), (154, 138836), (244, 87626), (308, 69418), (427, 50072), (488, 43813), (569, 37576), (616, 34709), (671, 31864), (854, 25036), (1138, 18788), (1342, 15932), (1708, 12518), (2276, 9394), (2684, 7966), (3416, 6259), (3983, 5368), (4552, 4697)]