20418580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{863}}^1$

素因数の和:905

約数の個数: 72

約数和(自身を含む): 53125632

約数和(自身を除く): 32707052

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 169, 182, 260, 338, 364, 455, 676, 845, 863, 910, 1183, 1690, 1726, 1820, 2366, 3380, 3452, 4315, 4732, 5915, 6041, 8630, 11219, 11830, 12082, 17260, 22438, 23660, 24164, 30205, 44876, 56095, 60410, 78533, 112190, 120820, 145847, 157066, 224380, 291694, 314132, 392665, 583388, 729235, 785330, 1020929, 1458470, 1570660, 2041858, 2916940, 4083716, 5104645, 10209290, 20418580]

約数ペア:

[(1, 20418580), (2, 10209290), (4, 5104645), (5, 4083716), (7, 2916940), (10, 2041858), (13, 1570660), (14, 1458470), (20, 1020929), (26, 785330), (28, 729235), (35, 583388), (52, 392665), (65, 314132), (70, 291694), (91, 224380), (130, 157066), (140, 145847), (169, 120820), (182, 112190), (260, 78533), (338, 60410), (364, 56095), (455, 44876), (676, 30205), (845, 24164), (863, 23660), (910, 22438), (1183, 17260), (1690, 12082), (1726, 11830), (1820, 11219), (2366, 8630), (3380, 6041), (3452, 5915), (4315, 4732)]