20153900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{419}}^1$

素因数の和:483

約数の個数: 72

約数和(自身を含む): 48486480

約数和(自身を除く): 28332580

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 37, 50, 52, 65, 74, 100, 130, 148, 185, 260, 325, 370, 419, 481, 650, 740, 838, 925, 962, 1300, 1676, 1850, 1924, 2095, 2405, 3700, 4190, 4810, 5447, 8380, 9620, 10475, 10894, 12025, 15503, 20950, 21788, 24050, 27235, 31006, 41900, 48100, 54470, 62012, 77515, 108940, 136175, 155030, 201539, 272350, 310060, 387575, 403078, 544700, 775150, 806156, 1007695, 1550300, 2015390, 4030780, 5038475, 10076950, 20153900]

約数ペア:

[(1, 20153900), (2, 10076950), (4, 5038475), (5, 4030780), (10, 2015390), (13, 1550300), (20, 1007695), (25, 806156), (26, 775150), (37, 544700), (50, 403078), (52, 387575), (65, 310060), (74, 272350), (100, 201539), (130, 155030), (148, 136175), (185, 108940), (260, 77515), (325, 62012), (370, 54470), (419, 48100), (481, 41900), (650, 31006), (740, 27235), (838, 24050), (925, 21788), (962, 20950), (1300, 15503), (1676, 12025), (1850, 10894), (1924, 10475), (2095, 9620), (2405, 8380), (3700, 5447), (4190, 4810)]