278589020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1\times {\mathrm{2609}}^1$

素因数の和:2918

約数の個数: 48

約数和(自身を含む): 618256800

約数和(自身を除く): 339667780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 281, 380, 562, 1124, 1405, 2609, 2810, 5218, 5339, 5620, 10436, 10678, 13045, 21356, 26090, 26695, 49571, 52180, 53390, 99142, 106780, 198284, 247855, 495710, 733129, 991420, 1466258, 2932516, 3665645, 7331290, 13929451, 14662580, 27858902, 55717804, 69647255, 139294510, 278589020]

約数ペア:

[(1, 278589020), (2, 139294510), (4, 69647255), (5, 55717804), (10, 27858902), (19, 14662580), (20, 13929451), (38, 7331290), (76, 3665645), (95, 2932516), (190, 1466258), (281, 991420), (380, 733129), (562, 495710), (1124, 247855), (1405, 198284), (2609, 106780), (2810, 99142), (5218, 53390), (5339, 52180), (5620, 49571), (10436, 26695), (10678, 26090), (13045, 21356)]