20496440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{181}}^1$

素因数の和:360

約数の個数: 64

約数和(自身を含む): 49140000

約数和(自身を除く): 28643560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 149, 152, 181, 190, 298, 362, 380, 596, 724, 745, 760, 905, 1192, 1448, 1490, 1810, 2831, 2980, 3439, 3620, 5662, 5960, 6878, 7240, 11324, 13756, 14155, 17195, 22648, 26969, 27512, 28310, 34390, 53938, 56620, 68780, 107876, 113240, 134845, 137560, 215752, 269690, 512411, 539380, 1024822, 1078760, 2049644, 2562055, 4099288, 5124110, 10248220, 20496440]

約数ペア:

[(1, 20496440), (2, 10248220), (4, 5124110), (5, 4099288), (8, 2562055), (10, 2049644), (19, 1078760), (20, 1024822), (38, 539380), (40, 512411), (76, 269690), (95, 215752), (149, 137560), (152, 134845), (181, 113240), (190, 107876), (298, 68780), (362, 56620), (380, 53938), (596, 34390), (724, 28310), (745, 27512), (760, 26969), (905, 22648), (1192, 17195), (1448, 14155), (1490, 13756), (1810, 11324), (2831, 7240), (2980, 6878), (3439, 5960), (3620, 5662)]