20531420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{389}}^1$

素因数の和:447

約数の個数: 96

約数和(自身を含む): 55036800

約数和(自身を除く): 34505380

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 29, 35, 52, 58, 65, 70, 91, 116, 130, 140, 145, 182, 203, 260, 290, 364, 377, 389, 406, 455, 580, 754, 778, 812, 910, 1015, 1508, 1556, 1820, 1885, 1945, 2030, 2639, 2723, 3770, 3890, 4060, 5057, 5278, 5446, 7540, 7780, 10114, 10556, 10892, 11281, 13195, 13615, 20228, 22562, 25285, 26390, 27230, 35399, 45124, 50570, 52780, 54460, 56405, 70798, 78967, 101140, 112810, 141596, 146653, 157934, 176995, 225620, 293306, 315868, 353990, 394835, 586612, 707980, 733265, 789670, 1026571, 1466530, 1579340, 2053142, 2933060, 4106284, 5132855, 10265710, 20531420]

約数ペア:

[(1, 20531420), (2, 10265710), (4, 5132855), (5, 4106284), (7, 2933060), (10, 2053142), (13, 1579340), (14, 1466530), (20, 1026571), (26, 789670), (28, 733265), (29, 707980), (35, 586612), (52, 394835), (58, 353990), (65, 315868), (70, 293306), (91, 225620), (116, 176995), (130, 157934), (140, 146653), (145, 141596), (182, 112810), (203, 101140), (260, 78967), (290, 70798), (364, 56405), (377, 54460), (389, 52780), (406, 50570), (455, 45124), (580, 35399), (754, 27230), (778, 26390), (812, 25285), (910, 22562), (1015, 20228), (1508, 13615), (1556, 13195), (1820, 11281), (1885, 10892), (1945, 10556), (2030, 10114), (2639, 7780), (2723, 7540), (3770, 5446), (3890, 5278), (4060, 5057)]