21453525

素因数分解:

$3^3\times 5^2\times {\mathrm{37}}^1\times {\mathrm{859}}^1$

素因数の和:915

約数の個数: 48

約数和(自身を含む): 40523200

約数和(自身を除く): 19069675

約数列:

[1, 3, 5, 9, 15, 25, 27, 37, 45, 75, 111, 135, 185, 225, 333, 555, 675, 859, 925, 999, 1665, 2577, 2775, 4295, 4995, 7731, 8325, 12885, 21475, 23193, 24975, 31783, 38655, 64425, 95349, 115965, 158915, 193275, 286047, 476745, 579825, 794575, 858141, 1430235, 2383725, 4290705, 7151175, 21453525]

約数ペア:

[(1, 21453525), (3, 7151175), (5, 4290705), (9, 2383725), (15, 1430235), (25, 858141), (27, 794575), (37, 579825), (45, 476745), (75, 286047), (111, 193275), (135, 158915), (185, 115965), (225, 95349), (333, 64425), (555, 38655), (675, 31783), (859, 24975), (925, 23193), (999, 21475), (1665, 12885), (2577, 8325), (2775, 7731), (4295, 4995)]