21106904

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{367}}^1$

素因数の和:472

約数の個数: 64

約数和(自身を含む): 49459200

約数和(自身を除く): 28352296

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 79, 91, 104, 158, 182, 316, 364, 367, 553, 632, 728, 734, 1027, 1106, 1468, 2054, 2212, 2569, 2936, 4108, 4424, 4771, 5138, 7189, 8216, 9542, 10276, 14378, 19084, 20552, 28756, 28993, 33397, 38168, 57512, 57986, 66794, 115972, 133588, 202951, 231944, 267176, 376909, 405902, 753818, 811804, 1507636, 1623608, 2638363, 3015272, 5276726, 10553452, 21106904]

約数ペア:

[(1, 21106904), (2, 10553452), (4, 5276726), (7, 3015272), (8, 2638363), (13, 1623608), (14, 1507636), (26, 811804), (28, 753818), (52, 405902), (56, 376909), (79, 267176), (91, 231944), (104, 202951), (158, 133588), (182, 115972), (316, 66794), (364, 57986), (367, 57512), (553, 38168), (632, 33397), (728, 28993), (734, 28756), (1027, 20552), (1106, 19084), (1468, 14378), (2054, 10276), (2212, 9542), (2569, 8216), (2936, 7189), (4108, 5138), (4424, 4771)]