18878535

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{347}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 37416960

約数和(自身を除く): 18538425

約数列:

[1, 3, 5, 9, 13, 15, 27, 31, 39, 45, 65, 93, 117, 135, 155, 195, 279, 347, 351, 403, 465, 585, 837, 1041, 1209, 1395, 1735, 1755, 2015, 3123, 3627, 4185, 4511, 5205, 6045, 9369, 10757, 10881, 13533, 15615, 18135, 22555, 32271, 40599, 46845, 53785, 54405, 67665, 96813, 121797, 139841, 161355, 202995, 290439, 419523, 484065, 608985, 699205, 1258569, 1452195, 2097615, 3775707, 6292845, 18878535]

約数ペア:

[(1, 18878535), (3, 6292845), (5, 3775707), (9, 2097615), (13, 1452195), (15, 1258569), (27, 699205), (31, 608985), (39, 484065), (45, 419523), (65, 290439), (93, 202995), (117, 161355), (135, 139841), (155, 121797), (195, 96813), (279, 67665), (347, 54405), (351, 53785), (403, 46845), (465, 40599), (585, 32271), (837, 22555), (1041, 18135), (1209, 15615), (1395, 13533), (1735, 10881), (1755, 10757), (2015, 9369), (3123, 6045), (3627, 5205), (4185, 4511)]