28225460

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 60918480

約数和(自身を除く): 32693020

約数列:

[1, 2, 4, 5, 10, 20, 89, 101, 157, 178, 202, 314, 356, 404, 445, 505, 628, 785, 890, 1010, 1570, 1780, 2020, 3140, 8989, 13973, 15857, 17978, 27946, 31714, 35956, 44945, 55892, 63428, 69865, 79285, 89890, 139730, 158570, 179780, 279460, 317140, 1411273, 2822546, 5645092, 7056365, 14112730, 28225460]

約数ペア:

[(1, 28225460), (2, 14112730), (4, 7056365), (5, 5645092), (10, 2822546), (20, 1411273), (89, 317140), (101, 279460), (157, 179780), (178, 158570), (202, 139730), (314, 89890), (356, 79285), (404, 69865), (445, 63428), (505, 55892), (628, 44945), (785, 35956), (890, 31714), (1010, 27946), (1570, 17978), (1780, 15857), (2020, 13973), (3140, 8989)]