19895780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{359}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 24738460

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 163, 170, 326, 340, 359, 652, 718, 815, 1436, 1630, 1795, 2771, 3260, 3590, 5542, 6103, 7180, 11084, 12206, 13855, 24412, 27710, 30515, 55420, 58517, 61030, 117034, 122060, 234068, 292585, 585170, 994789, 1170340, 1989578, 3979156, 4973945, 9947890, 19895780]

約数ペア:

[(1, 19895780), (2, 9947890), (4, 4973945), (5, 3979156), (10, 1989578), (17, 1170340), (20, 994789), (34, 585170), (68, 292585), (85, 234068), (163, 122060), (170, 117034), (326, 61030), (340, 58517), (359, 55420), (652, 30515), (718, 27710), (815, 24412), (1436, 13855), (1630, 12206), (1795, 11084), (2771, 7180), (3260, 6103), (3590, 5542)]