21993675

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{503}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 40497408

約数和(自身を除く): 18503733

約数列:

[1, 3, 5, 11, 15, 25, 33, 53, 55, 75, 159, 165, 265, 275, 503, 583, 795, 825, 1325, 1509, 1749, 2515, 2915, 3975, 5533, 7545, 8745, 12575, 14575, 16599, 26659, 27665, 37725, 43725, 79977, 82995, 133295, 138325, 293249, 399885, 414975, 666475, 879747, 1466245, 1999425, 4398735, 7331225, 21993675]

約数ペア:

[(1, 21993675), (3, 7331225), (5, 4398735), (11, 1999425), (15, 1466245), (25, 879747), (33, 666475), (53, 414975), (55, 399885), (75, 293249), (159, 138325), (165, 133295), (265, 82995), (275, 79977), (503, 43725), (583, 37725), (795, 27665), (825, 26659), (1325, 16599), (1509, 14575), (1749, 12575), (2515, 8745), (2915, 7545), (3975, 5533)]