20574320

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{271}}^1$

素因数の和:370

約数の個数: 80

約数和(自身を含む): 52413312

約数和(自身を除く): 31838992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 73, 80, 104, 130, 146, 208, 260, 271, 292, 365, 520, 542, 584, 730, 949, 1040, 1084, 1168, 1355, 1460, 1898, 2168, 2710, 2920, 3523, 3796, 4336, 4745, 5420, 5840, 7046, 7592, 9490, 10840, 14092, 15184, 17615, 18980, 19783, 21680, 28184, 35230, 37960, 39566, 56368, 70460, 75920, 79132, 98915, 140920, 158264, 197830, 257179, 281840, 316528, 395660, 514358, 791320, 1028716, 1285895, 1582640, 2057432, 2571790, 4114864, 5143580, 10287160, 20574320]

約数ペア:

[(1, 20574320), (2, 10287160), (4, 5143580), (5, 4114864), (8, 2571790), (10, 2057432), (13, 1582640), (16, 1285895), (20, 1028716), (26, 791320), (40, 514358), (52, 395660), (65, 316528), (73, 281840), (80, 257179), (104, 197830), (130, 158264), (146, 140920), (208, 98915), (260, 79132), (271, 75920), (292, 70460), (365, 56368), (520, 39566), (542, 37960), (584, 35230), (730, 28184), (949, 21680), (1040, 19783), (1084, 18980), (1168, 17615), (1355, 15184), (1460, 14092), (1898, 10840), (2168, 9490), (2710, 7592), (2920, 7046), (3523, 5840), (3796, 5420), (4336, 4745)]