18002920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:502

約数の個数: 64

約数和(自身を含む): 44226000

約数和(自身を除く): 26223080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 89, 104, 130, 178, 260, 356, 389, 445, 520, 712, 778, 890, 1157, 1556, 1780, 1945, 2314, 3112, 3560, 3890, 4628, 5057, 5785, 7780, 9256, 10114, 11570, 15560, 20228, 23140, 25285, 34621, 40456, 46280, 50570, 69242, 101140, 138484, 173105, 202280, 276968, 346210, 450073, 692420, 900146, 1384840, 1800292, 2250365, 3600584, 4500730, 9001460, 18002920]

約数ペア:

[(1, 18002920), (2, 9001460), (4, 4500730), (5, 3600584), (8, 2250365), (10, 1800292), (13, 1384840), (20, 900146), (26, 692420), (40, 450073), (52, 346210), (65, 276968), (89, 202280), (104, 173105), (130, 138484), (178, 101140), (260, 69242), (356, 50570), (389, 46280), (445, 40456), (520, 34621), (712, 25285), (778, 23140), (890, 20228), (1157, 15560), (1556, 11570), (1780, 10114), (1945, 9256), (2314, 7780), (3112, 5785), (3560, 5057), (3890, 4628)]