81254620

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{503}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 176033088

約数和(自身を除く): 94778468

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 197, 205, 394, 410, 503, 788, 820, 985, 1006, 1970, 2012, 2515, 3940, 5030, 8077, 10060, 16154, 20623, 32308, 40385, 41246, 80770, 82492, 99091, 103115, 161540, 198182, 206230, 396364, 412460, 495455, 990910, 1981820, 4062731, 8125462, 16250924, 20313655, 40627310, 81254620]

約数ペア:

[(1, 81254620), (2, 40627310), (4, 20313655), (5, 16250924), (10, 8125462), (20, 4062731), (41, 1981820), (82, 990910), (164, 495455), (197, 412460), (205, 396364), (394, 206230), (410, 198182), (503, 161540), (788, 103115), (820, 99091), (985, 82492), (1006, 80770), (1970, 41246), (2012, 40385), (2515, 32308), (3940, 20623), (5030, 16154), (8077, 10060)]