80680280

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1\times {\mathrm{173}}^1$

素因数の和:404

約数の個数: 64

約数和(自身を含む): 186040800

約数和(自身を除く): 105360520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 131, 173, 178, 262, 346, 356, 445, 524, 655, 692, 712, 865, 890, 1048, 1310, 1384, 1730, 1780, 2620, 3460, 3560, 5240, 6920, 11659, 15397, 22663, 23318, 30794, 45326, 46636, 58295, 61588, 76985, 90652, 93272, 113315, 116590, 123176, 153970, 181304, 226630, 233180, 307940, 453260, 466360, 615880, 906520, 2017007, 4034014, 8068028, 10085035, 16136056, 20170070, 40340140, 80680280]

約数ペア:

[(1, 80680280), (2, 40340140), (4, 20170070), (5, 16136056), (8, 10085035), (10, 8068028), (20, 4034014), (40, 2017007), (89, 906520), (131, 615880), (173, 466360), (178, 453260), (262, 307940), (346, 233180), (356, 226630), (445, 181304), (524, 153970), (655, 123176), (692, 116590), (712, 113315), (865, 93272), (890, 90652), (1048, 76985), (1310, 61588), (1384, 58295), (1730, 46636), (1780, 45326), (2620, 30794), (3460, 23318), (3560, 22663), (5240, 15397), (6920, 11659)]