20878065

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{401}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 39508560

約数和(自身を除く): 18630495

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 89, 117, 195, 267, 401, 445, 585, 801, 1157, 1203, 1335, 2005, 3471, 3609, 4005, 5213, 5785, 6015, 10413, 15639, 17355, 18045, 26065, 35689, 46917, 52065, 78195, 107067, 178445, 234585, 321201, 463957, 535335, 1391871, 1606005, 2319785, 4175613, 6959355, 20878065]

約数ペア:

[(1, 20878065), (3, 6959355), (5, 4175613), (9, 2319785), (13, 1606005), (15, 1391871), (39, 535335), (45, 463957), (65, 321201), (89, 234585), (117, 178445), (195, 107067), (267, 78195), (401, 52065), (445, 46917), (585, 35689), (801, 26065), (1157, 18045), (1203, 17355), (1335, 15639), (2005, 10413), (3471, 6015), (3609, 5785), (4005, 5213)]