21001920

素因数分解:

$2^6\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:318

約数の個数: 112

約数和(自身を含む): 67592448

約数和(自身を除く): 46590528

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 131, 160, 167, 192, 240, 262, 320, 334, 393, 480, 501, 524, 655, 668, 786, 835, 960, 1002, 1048, 1310, 1336, 1572, 1670, 1965, 2004, 2096, 2505, 2620, 2672, 3144, 3340, 3930, 4008, 4192, 5010, 5240, 5344, 6288, 6680, 7860, 8016, 8384, 10020, 10480, 10688, 12576, 13360, 15720, 16032, 20040, 20960, 21877, 25152, 26720, 31440, 32064, 40080, 41920, 43754, 53440, 62880, 65631, 80160, 87508, 109385, 125760, 131262, 160320, 175016, 218770, 262524, 328155, 350032, 437540, 525048, 656310, 700064, 875080, 1050096, 1312620, 1400128, 1750160, 2100192, 2625240, 3500320, 4200384, 5250480, 7000640, 10500960, 21001920]

約数ペア:

[(1, 21001920), (2, 10500960), (3, 7000640), (4, 5250480), (5, 4200384), (6, 3500320), (8, 2625240), (10, 2100192), (12, 1750160), (15, 1400128), (16, 1312620), (20, 1050096), (24, 875080), (30, 700064), (32, 656310), (40, 525048), (48, 437540), (60, 350032), (64, 328155), (80, 262524), (96, 218770), (120, 175016), (131, 160320), (160, 131262), (167, 125760), (192, 109385), (240, 87508), (262, 80160), (320, 65631), (334, 62880), (393, 53440), (480, 43754), (501, 41920), (524, 40080), (655, 32064), (668, 31440), (786, 26720), (835, 25152), (960, 21877), (1002, 20960), (1048, 20040), (1310, 16032), (1336, 15720), (1572, 13360), (1670, 12576), (1965, 10688), (2004, 10480), (2096, 10020), (2505, 8384), (2620, 8016), (2672, 7860), (3144, 6680), (3340, 6288), (3930, 5344), (4008, 5240), (4192, 5010)]