21391140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{541}}^1\times {\mathrm{659}}^1$

素因数の和:1212

約数の個数: 48

約数和(自身を含む): 60096960

約数和(自身を除く): 38705820

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 541, 659, 1082, 1318, 1623, 1977, 2164, 2636, 2705, 3246, 3295, 3954, 5410, 6492, 6590, 7908, 8115, 9885, 10820, 13180, 16230, 19770, 32460, 39540, 356519, 713038, 1069557, 1426076, 1782595, 2139114, 3565190, 4278228, 5347785, 7130380, 10695570, 21391140]

約数ペア:

[(1, 21391140), (2, 10695570), (3, 7130380), (4, 5347785), (5, 4278228), (6, 3565190), (10, 2139114), (12, 1782595), (15, 1426076), (20, 1069557), (30, 713038), (60, 356519), (541, 39540), (659, 32460), (1082, 19770), (1318, 16230), (1623, 13180), (1977, 10820), (2164, 9885), (2636, 8115), (2705, 7908), (3246, 6590), (3295, 6492), (3954, 5410)]