21449475

素因数分解:

$3^3\times 5^2\times {\mathrm{43}}^1\times {\mathrm{739}}^1$

素因数の和:801

約数の個数: 48

約数和(自身を含む): 40374400

約数和(自身を除く): 18924925

約数列:

[1, 3, 5, 9, 15, 25, 27, 43, 45, 75, 129, 135, 215, 225, 387, 645, 675, 739, 1075, 1161, 1935, 2217, 3225, 3695, 5805, 6651, 9675, 11085, 18475, 19953, 29025, 31777, 33255, 55425, 95331, 99765, 158885, 166275, 285993, 476655, 498825, 794425, 857979, 1429965, 2383275, 4289895, 7149825, 21449475]

約数ペア:

[(1, 21449475), (3, 7149825), (5, 4289895), (9, 2383275), (15, 1429965), (25, 857979), (27, 794425), (43, 498825), (45, 476655), (75, 285993), (129, 166275), (135, 158885), (215, 99765), (225, 95331), (387, 55425), (645, 33255), (675, 31777), (739, 29025), (1075, 19953), (1161, 18475), (1935, 11085), (2217, 9675), (3225, 6651), (3695, 5805)]