90378920

素因数分解:

$2^3\times 5^1\times {\mathrm{1021}}^1\times {\mathrm{2213}}^1$

素因数の和:3245

約数の個数: 32

約数和(自身を含む): 203643720

約数和(自身を除く): 113264800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1021, 2042, 2213, 4084, 4426, 5105, 8168, 8852, 10210, 11065, 17704, 20420, 22130, 40840, 44260, 88520, 2259473, 4518946, 9037892, 11297365, 18075784, 22594730, 45189460, 90378920]

約数ペア:

[(1, 90378920), (2, 45189460), (4, 22594730), (5, 18075784), (8, 11297365), (10, 9037892), (20, 4518946), (40, 2259473), (1021, 88520), (2042, 44260), (2213, 40840), (4084, 22130), (4426, 20420), (5105, 17704), (8168, 11065), (8852, 10210)]