20612240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{397}}^1$

素因数の和:480

約数の個数: 80

約数和(自身を含む): 53300160

約数和(自身を除く): 32687920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 59, 80, 88, 110, 118, 176, 220, 236, 295, 397, 440, 472, 590, 649, 794, 880, 944, 1180, 1298, 1588, 1985, 2360, 2596, 3176, 3245, 3970, 4367, 4720, 5192, 6352, 6490, 7940, 8734, 10384, 12980, 15880, 17468, 21835, 23423, 25960, 31760, 34936, 43670, 46846, 51920, 69872, 87340, 93692, 117115, 174680, 187384, 234230, 257653, 349360, 374768, 468460, 515306, 936920, 1030612, 1288265, 1873840, 2061224, 2576530, 4122448, 5153060, 10306120, 20612240]

約数ペア:

[(1, 20612240), (2, 10306120), (4, 5153060), (5, 4122448), (8, 2576530), (10, 2061224), (11, 1873840), (16, 1288265), (20, 1030612), (22, 936920), (40, 515306), (44, 468460), (55, 374768), (59, 349360), (80, 257653), (88, 234230), (110, 187384), (118, 174680), (176, 117115), (220, 93692), (236, 87340), (295, 69872), (397, 51920), (440, 46846), (472, 43670), (590, 34936), (649, 31760), (794, 25960), (880, 23423), (944, 21835), (1180, 17468), (1298, 15880), (1588, 12980), (1985, 10384), (2360, 8734), (2596, 7940), (3176, 6490), (3245, 6352), (3970, 5192), (4367, 4720)]