20859644

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 42430080

約数和(自身を除く): 21570436

約数列:

[1, 2, 4, 13, 19, 26, 38, 43, 52, 76, 86, 172, 247, 491, 494, 559, 817, 982, 988, 1118, 1634, 1964, 2236, 3268, 6383, 9329, 10621, 12766, 18658, 21113, 21242, 25532, 37316, 42226, 42484, 84452, 121277, 242554, 274469, 401147, 485108, 548938, 802294, 1097876, 1604588, 5214911, 10429822, 20859644]

約数ペア:

[(1, 20859644), (2, 10429822), (4, 5214911), (13, 1604588), (19, 1097876), (26, 802294), (38, 548938), (43, 485108), (52, 401147), (76, 274469), (86, 242554), (172, 121277), (247, 84452), (491, 42484), (494, 42226), (559, 37316), (817, 25532), (982, 21242), (988, 21113), (1118, 18658), (1634, 12766), (1964, 10621), (2236, 9329), (3268, 6383)]