81225160

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{33289}}^1$

素因数の和:33361

約数の個数: 32

約数和(自身を含む): 185758200

約数和(自身を除く): 104533040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 33289, 66578, 133156, 166445, 266312, 332890, 665780, 1331560, 2030629, 4061258, 8122516, 10153145, 16245032, 20306290, 40612580, 81225160]

約数ペア:

[(1, 81225160), (2, 40612580), (4, 20306290), (5, 16245032), (8, 10153145), (10, 8122516), (20, 4061258), (40, 2030629), (61, 1331560), (122, 665780), (244, 332890), (305, 266312), (488, 166445), (610, 133156), (1220, 66578), (2440, 33289)]