21020220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{691}}^1$

素因数の和:732

約数の個数: 108

約数和(自身を含む): 69143256

約数和(自身を除く): 48123036

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 169, 180, 195, 234, 260, 338, 390, 468, 507, 585, 676, 691, 780, 845, 1014, 1170, 1382, 1521, 1690, 2028, 2073, 2340, 2535, 2764, 3042, 3380, 3455, 4146, 5070, 6084, 6219, 6910, 7605, 8292, 8983, 10140, 10365, 12438, 13820, 15210, 17966, 20730, 24876, 26949, 30420, 31095, 35932, 41460, 44915, 53898, 62190, 80847, 89830, 107796, 116779, 124380, 134745, 161694, 179660, 233558, 269490, 323388, 350337, 404235, 467116, 538980, 583895, 700674, 808470, 1051011, 1167790, 1401348, 1616940, 1751685, 2102022, 2335580, 3503370, 4204044, 5255055, 7006740, 10510110, 21020220]

約数ペア:

[(1, 21020220), (2, 10510110), (3, 7006740), (4, 5255055), (5, 4204044), (6, 3503370), (9, 2335580), (10, 2102022), (12, 1751685), (13, 1616940), (15, 1401348), (18, 1167790), (20, 1051011), (26, 808470), (30, 700674), (36, 583895), (39, 538980), (45, 467116), (52, 404235), (60, 350337), (65, 323388), (78, 269490), (90, 233558), (117, 179660), (130, 161694), (156, 134745), (169, 124380), (180, 116779), (195, 107796), (234, 89830), (260, 80847), (338, 62190), (390, 53898), (468, 44915), (507, 41460), (585, 35932), (676, 31095), (691, 30420), (780, 26949), (845, 24876), (1014, 20730), (1170, 17966), (1382, 15210), (1521, 13820), (1690, 12438), (2028, 10365), (2073, 10140), (2340, 8983), (2535, 8292), (2764, 7605), (3042, 6910), (3380, 6219), (3455, 6084), (4146, 5070)]