21975765

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{1031}}^1$

素因数の和:1082

約数の個数: 48

約数和(自身を含む): 42353280

約数和(自身を除く): 20377515

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 49, 87, 105, 145, 147, 203, 245, 435, 609, 735, 1015, 1031, 1421, 3045, 3093, 4263, 5155, 7105, 7217, 15465, 21315, 21651, 29899, 36085, 50519, 89697, 108255, 149495, 151557, 209293, 252595, 448485, 627879, 757785, 1046465, 1465051, 3139395, 4395153, 7325255, 21975765]

約数ペア:

[(1, 21975765), (3, 7325255), (5, 4395153), (7, 3139395), (15, 1465051), (21, 1046465), (29, 757785), (35, 627879), (49, 448485), (87, 252595), (105, 209293), (145, 151557), (147, 149495), (203, 108255), (245, 89697), (435, 50519), (609, 36085), (735, 29899), (1015, 21651), (1031, 21315), (1421, 15465), (3045, 7217), (3093, 7105), (4263, 5155)]