31881980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2609}}^1$

素因数の和:2678

約数の個数: 48

約数和(自身を含む): 73664640

約数和(自身を除く): 41782660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 2444, 2609, 3055, 5218, 6110, 10436, 12220, 13045, 26090, 33917, 52180, 67834, 122623, 135668, 169585, 245246, 339170, 490492, 613115, 678340, 1226230, 1594099, 2452460, 3188198, 6376396, 7970495, 15940990, 31881980]

約数ペア:

[(1, 31881980), (2, 15940990), (4, 7970495), (5, 6376396), (10, 3188198), (13, 2452460), (20, 1594099), (26, 1226230), (47, 678340), (52, 613115), (65, 490492), (94, 339170), (130, 245246), (188, 169585), (235, 135668), (260, 122623), (470, 67834), (611, 52180), (940, 33917), (1222, 26090), (2444, 13045), (2609, 12220), (3055, 10436), (5218, 6110)]