78471620

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{491}}^1$

素因数の和:692

約数の個数: 48

約数和(自身を含む): 169114176

約数和(自身を除く): 90642556

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 131, 244, 262, 305, 491, 524, 610, 655, 982, 1220, 1310, 1964, 2455, 2620, 4910, 7991, 9820, 15982, 29951, 31964, 39955, 59902, 64321, 79910, 119804, 128642, 149755, 159820, 257284, 299510, 321605, 599020, 643210, 1286420, 3923581, 7847162, 15694324, 19617905, 39235810, 78471620]

約数ペア:

[(1, 78471620), (2, 39235810), (4, 19617905), (5, 15694324), (10, 7847162), (20, 3923581), (61, 1286420), (122, 643210), (131, 599020), (244, 321605), (262, 299510), (305, 257284), (491, 159820), (524, 149755), (610, 128642), (655, 119804), (982, 79910), (1220, 64321), (1310, 59902), (1964, 39955), (2455, 31964), (2620, 29951), (4910, 15982), (7991, 9820)]