21230775

素因数分解:

$3^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:533

約数の個数: 48

約数和(自身を含む): 39640320

約数和(自身を除く): 18409545

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 71, 75, 135, 213, 225, 355, 443, 639, 675, 1065, 1329, 1775, 1917, 2215, 3195, 3987, 5325, 6645, 9585, 11075, 11961, 15975, 19935, 31453, 33225, 47925, 59805, 94359, 99675, 157265, 283077, 299025, 471795, 786325, 849231, 1415385, 2358975, 4246155, 7076925, 21230775]

約数ペア:

[(1, 21230775), (3, 7076925), (5, 4246155), (9, 2358975), (15, 1415385), (25, 849231), (27, 786325), (45, 471795), (71, 299025), (75, 283077), (135, 157265), (213, 99675), (225, 94359), (355, 59805), (443, 47925), (639, 33225), (675, 31453), (1065, 19935), (1329, 15975), (1775, 11961), (1917, 11075), (2215, 9585), (3195, 6645), (3987, 5325)]