88271980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{491}}^1$

素因数の和:690

約数の個数: 48

約数和(自身を含む): 189695520

約数和(自身を除く): 101423540

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 178, 202, 356, 404, 445, 491, 505, 890, 982, 1010, 1780, 1964, 2020, 2455, 4910, 8989, 9820, 17978, 35956, 43699, 44945, 49591, 87398, 89890, 99182, 174796, 179780, 198364, 218495, 247955, 436990, 495910, 873980, 991820, 4413599, 8827198, 17654396, 22067995, 44135990, 88271980]

約数ペア:

[(1, 88271980), (2, 44135990), (4, 22067995), (5, 17654396), (10, 8827198), (20, 4413599), (89, 991820), (101, 873980), (178, 495910), (202, 436990), (356, 247955), (404, 218495), (445, 198364), (491, 179780), (505, 174796), (890, 99182), (982, 89890), (1010, 87398), (1780, 49591), (1964, 44945), (2020, 43699), (2455, 35956), (4910, 17978), (8989, 9820)]