21477500

素因数分解:

$2^2\times 5^4\times {\mathrm{11}}^2\times {\mathrm{71}}^1$

素因数の和:117

約数の個数: 90

約数和(自身を含む): 52351992

約数和(自身を除く): 30874492

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 71, 100, 110, 121, 125, 142, 220, 242, 250, 275, 284, 355, 484, 500, 550, 605, 625, 710, 781, 1100, 1210, 1250, 1375, 1420, 1562, 1775, 2420, 2500, 2750, 3025, 3124, 3550, 3905, 5500, 6050, 6875, 7100, 7810, 8591, 8875, 12100, 13750, 15125, 15620, 17182, 17750, 19525, 27500, 30250, 34364, 35500, 39050, 42955, 44375, 60500, 75625, 78100, 85910, 88750, 97625, 151250, 171820, 177500, 195250, 214775, 302500, 390500, 429550, 488125, 859100, 976250, 1073875, 1952500, 2147750, 4295500, 5369375, 10738750, 21477500]

約数ペア:

[(1, 21477500), (2, 10738750), (4, 5369375), (5, 4295500), (10, 2147750), (11, 1952500), (20, 1073875), (22, 976250), (25, 859100), (44, 488125), (50, 429550), (55, 390500), (71, 302500), (100, 214775), (110, 195250), (121, 177500), (125, 171820), (142, 151250), (220, 97625), (242, 88750), (250, 85910), (275, 78100), (284, 75625), (355, 60500), (484, 44375), (500, 42955), (550, 39050), (605, 35500), (625, 34364), (710, 30250), (781, 27500), (1100, 19525), (1210, 17750), (1250, 17182), (1375, 15620), (1420, 15125), (1562, 13750), (1775, 12100), (2420, 8875), (2500, 8591), (2750, 7810), (3025, 7100), (3124, 6875), (3550, 6050), (3905, 5500)]