21647925

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{2467}}^1$

素因数の和:2499

約数の個数: 48

約数和(自身を含む): 42844480

約数和(自身を除く): 21196555

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 117, 135, 195, 225, 325, 351, 585, 675, 975, 1755, 2467, 2925, 7401, 8775, 12335, 22203, 32071, 37005, 61675, 66609, 96213, 111015, 160355, 185025, 288639, 333045, 481065, 555075, 801775, 865917, 1443195, 1665225, 2405325, 4329585, 7215975, 21647925]

約数ペア:

[(1, 21647925), (3, 7215975), (5, 4329585), (9, 2405325), (13, 1665225), (15, 1443195), (25, 865917), (27, 801775), (39, 555075), (45, 481065), (65, 333045), (75, 288639), (117, 185025), (135, 160355), (195, 111015), (225, 96213), (325, 66609), (351, 61675), (585, 37005), (675, 32071), (975, 22203), (1755, 12335), (2467, 8775), (2925, 7401)]