21083540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{491}}^1$

素因数の和:632

約数の個数: 48

約数和(自身を含む): 47113920

約数和(自身を除く): 26030380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 113, 190, 226, 380, 452, 491, 565, 982, 1130, 1964, 2147, 2260, 2455, 4294, 4910, 8588, 9329, 9820, 10735, 18658, 21470, 37316, 42940, 46645, 55483, 93290, 110966, 186580, 221932, 277415, 554830, 1054177, 1109660, 2108354, 4216708, 5270885, 10541770, 21083540]

約数ペア:

[(1, 21083540), (2, 10541770), (4, 5270885), (5, 4216708), (10, 2108354), (19, 1109660), (20, 1054177), (38, 554830), (76, 277415), (95, 221932), (113, 186580), (190, 110966), (226, 93290), (380, 55483), (452, 46645), (491, 42940), (565, 37316), (982, 21470), (1130, 18658), (1964, 10735), (2147, 9820), (2260, 9329), (2455, 8588), (4294, 4910)]