21719475

素因数分解:

$3^3\times 5^2\times {\mathrm{23}}^1\times {\mathrm{1399}}^1$

素因数の和:1441

約数の個数: 48

約数和(自身を含む): 41664000

約数和(自身を除く): 19944525

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 115, 135, 207, 225, 345, 575, 621, 675, 1035, 1399, 1725, 3105, 4197, 5175, 6995, 12591, 15525, 20985, 32177, 34975, 37773, 62955, 96531, 104925, 160885, 188865, 289593, 314775, 482655, 804425, 868779, 944325, 1447965, 2413275, 4343895, 7239825, 21719475]

約数ペア:

[(1, 21719475), (3, 7239825), (5, 4343895), (9, 2413275), (15, 1447965), (23, 944325), (25, 868779), (27, 804425), (45, 482655), (69, 314775), (75, 289593), (115, 188865), (135, 160885), (207, 104925), (225, 96531), (345, 62955), (575, 37773), (621, 34975), (675, 32177), (1035, 20985), (1399, 15525), (1725, 12591), (3105, 6995), (4197, 5175)]