21211250

素因数分解:

$2^1\times 5^4\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:332

約数の個数: 40

約数和(自身を含む): 40487040

約数和(自身を除く): 19275790

約数列:

[1, 2, 5, 10, 25, 50, 71, 125, 142, 239, 250, 355, 478, 625, 710, 1195, 1250, 1775, 2390, 3550, 5975, 8875, 11950, 16969, 17750, 29875, 33938, 44375, 59750, 84845, 88750, 149375, 169690, 298750, 424225, 848450, 2121125, 4242250, 10605625, 21211250]

約数ペア:

[(1, 21211250), (2, 10605625), (5, 4242250), (10, 2121125), (25, 848450), (50, 424225), (71, 298750), (125, 169690), (142, 149375), (239, 88750), (250, 84845), (355, 59750), (478, 44375), (625, 33938), (710, 29875), (1195, 17750), (1250, 16969), (1775, 11950), (2390, 8875), (3550, 5975)]