18657825

素因数分解:

$3^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 32378880

約数和(自身を除く): 13721055

約数列:

[1, 3, 5, 15, 25, 47, 67, 75, 79, 141, 201, 235, 237, 335, 395, 705, 1005, 1175, 1185, 1675, 1975, 3149, 3525, 3713, 5025, 5293, 5925, 9447, 11139, 15745, 15879, 18565, 26465, 47235, 55695, 78725, 79395, 92825, 132325, 236175, 248771, 278475, 396975, 746313, 1243855, 3731565, 6219275, 18657825]

約数ペア:

[(1, 18657825), (3, 6219275), (5, 3731565), (15, 1243855), (25, 746313), (47, 396975), (67, 278475), (75, 248771), (79, 236175), (141, 132325), (201, 92825), (235, 79395), (237, 78725), (335, 55695), (395, 47235), (705, 26465), (1005, 18565), (1175, 15879), (1185, 15745), (1675, 11139), (1975, 9447), (3149, 5925), (3525, 5293), (3713, 5025)]