19860520

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{953}}^1$

素因数の和:1485

約数の個数: 32

約数和(自身を含む): 44818920

約数和(自身を除く): 24958400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 953, 1042, 1906, 2084, 2605, 3812, 4168, 4765, 5210, 7624, 9530, 10420, 19060, 20840, 38120, 496513, 993026, 1986052, 2482565, 3972104, 4965130, 9930260, 19860520]

約数ペア:

[(1, 19860520), (2, 9930260), (4, 4965130), (5, 3972104), (8, 2482565), (10, 1986052), (20, 993026), (40, 496513), (521, 38120), (953, 20840), (1042, 19060), (1906, 10420), (2084, 9530), (2605, 7624), (3812, 5210), (4168, 4765)]