21256250

素因数分解:

$2^1\times 5^5\times {\mathrm{19}}^1\times {\mathrm{179}}^1$

素因数の和:225

約数の個数: 48

約数和(自身を含む): 42184800

約数和(自身を除く): 20928550

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 125, 179, 190, 250, 358, 475, 625, 895, 950, 1250, 1790, 2375, 3125, 3401, 4475, 4750, 6250, 6802, 8950, 11875, 17005, 22375, 23750, 34010, 44750, 59375, 85025, 111875, 118750, 170050, 223750, 425125, 559375, 850250, 1118750, 2125625, 4251250, 10628125, 21256250]

約数ペア:

[(1, 21256250), (2, 10628125), (5, 4251250), (10, 2125625), (19, 1118750), (25, 850250), (38, 559375), (50, 425125), (95, 223750), (125, 170050), (179, 118750), (190, 111875), (250, 85025), (358, 59375), (475, 44750), (625, 34010), (895, 23750), (950, 22375), (1250, 17005), (1790, 11875), (2375, 8950), (3125, 6802), (3401, 6250), (4475, 4750)]