89989660

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:706

約数の個数: 48

約数和(自身を含む): 193536000

約数和(自身を除く): 103546340

約数列:

[1, 2, 4, 5, 10, 20, 71, 127, 142, 254, 284, 355, 499, 508, 635, 710, 998, 1270, 1420, 1996, 2495, 2540, 4990, 9017, 9980, 18034, 35429, 36068, 45085, 63373, 70858, 90170, 126746, 141716, 177145, 180340, 253492, 316865, 354290, 633730, 708580, 1267460, 4499483, 8998966, 17997932, 22497415, 44994830, 89989660]

約数ペア:

[(1, 89989660), (2, 44994830), (4, 22497415), (5, 17997932), (10, 8998966), (20, 4499483), (71, 1267460), (127, 708580), (142, 633730), (254, 354290), (284, 316865), (355, 253492), (499, 180340), (508, 177145), (635, 141716), (710, 126746), (998, 90170), (1270, 70858), (1420, 63373), (1996, 45085), (2495, 36068), (2540, 35429), (4990, 18034), (9017, 9980)]