20640750

素因数分解:

$2^1\times 3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:135

約数の個数: 128

約数和(自身を含む): 58181760

約数和(自身を除く): 37541010

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 29, 30, 39, 50, 58, 65, 73, 75, 78, 87, 125, 130, 145, 146, 150, 174, 195, 219, 250, 290, 325, 365, 375, 377, 390, 435, 438, 650, 725, 730, 750, 754, 870, 949, 975, 1095, 1131, 1450, 1625, 1825, 1885, 1898, 1950, 2117, 2175, 2190, 2262, 2847, 3250, 3625, 3650, 3770, 4234, 4350, 4745, 4875, 5475, 5655, 5694, 6351, 7250, 9125, 9425, 9490, 9750, 10585, 10875, 10950, 11310, 12702, 14235, 18250, 18850, 21170, 21750, 23725, 27375, 27521, 28275, 28470, 31755, 47125, 47450, 52925, 54750, 55042, 56550, 63510, 71175, 82563, 94250, 105850, 118625, 137605, 141375, 142350, 158775, 165126, 237250, 264625, 275210, 282750, 317550, 355875, 412815, 529250, 688025, 711750, 793875, 825630, 1376050, 1587750, 2064075, 3440125, 4128150, 6880250, 10320375, 20640750]

約数ペア:

[(1, 20640750), (2, 10320375), (3, 6880250), (5, 4128150), (6, 3440125), (10, 2064075), (13, 1587750), (15, 1376050), (25, 825630), (26, 793875), (29, 711750), (30, 688025), (39, 529250), (50, 412815), (58, 355875), (65, 317550), (73, 282750), (75, 275210), (78, 264625), (87, 237250), (125, 165126), (130, 158775), (145, 142350), (146, 141375), (150, 137605), (174, 118625), (195, 105850), (219, 94250), (250, 82563), (290, 71175), (325, 63510), (365, 56550), (375, 55042), (377, 54750), (390, 52925), (435, 47450), (438, 47125), (650, 31755), (725, 28470), (730, 28275), (750, 27521), (754, 27375), (870, 23725), (949, 21750), (975, 21170), (1095, 18850), (1131, 18250), (1450, 14235), (1625, 12702), (1825, 11310), (1885, 10950), (1898, 10875), (1950, 10585), (2117, 9750), (2175, 9490), (2190, 9425), (2262, 9125), (2847, 7250), (3250, 6351), (3625, 5694), (3650, 5655), (3770, 5475), (4234, 4875), (4350, 4745)]