20402380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2609}}^1$

素因数の和:2658

約数の個数: 48

約数和(自身を含む): 47355840

約数和(自身を除く): 26953460

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2609, 3910, 5218, 7820, 10436, 13045, 26090, 44353, 52180, 60007, 88706, 120014, 177412, 221765, 240028, 300035, 443530, 600070, 887060, 1020119, 1200140, 2040238, 4080476, 5100595, 10201190, 20402380]

約数ペア:

[(1, 20402380), (2, 10201190), (4, 5100595), (5, 4080476), (10, 2040238), (17, 1200140), (20, 1020119), (23, 887060), (34, 600070), (46, 443530), (68, 300035), (85, 240028), (92, 221765), (115, 177412), (170, 120014), (230, 88706), (340, 60007), (391, 52180), (460, 44353), (782, 26090), (1564, 13045), (1955, 10436), (2609, 7820), (3910, 5218)]