989163580

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{439}}^1\times {\mathrm{997}}^1$

素因数の和:1558

約数の個数: 48

約数和(自身を含む): 2102506560

約数和(自身を除く): 1113342980

約数列:

[1, 2, 4, 5, 10, 20, 113, 226, 439, 452, 565, 878, 997, 1130, 1756, 1994, 2195, 2260, 3988, 4390, 4985, 8780, 9970, 19940, 49607, 99214, 112661, 198428, 225322, 248035, 437683, 450644, 496070, 563305, 875366, 992140, 1126610, 1750732, 2188415, 2253220, 4376830, 8753660, 49458179, 98916358, 197832716, 247290895, 494581790, 989163580]

約数ペア:

[(1, 989163580), (2, 494581790), (4, 247290895), (5, 197832716), (10, 98916358), (20, 49458179), (113, 8753660), (226, 4376830), (439, 2253220), (452, 2188415), (565, 1750732), (878, 1126610), (997, 992140), (1130, 875366), (1756, 563305), (1994, 496070), (2195, 450644), (2260, 437683), (3988, 248035), (4390, 225322), (4985, 198428), (8780, 112661), (9970, 99214), (19940, 49607)]