212420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:84

約数の個数: 48

約数和(自身を含む): 517440

約数和(自身を除く): 305020

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 43, 52, 65, 76, 86, 95, 130, 172, 190, 215, 247, 260, 380, 430, 494, 559, 817, 860, 988, 1118, 1235, 1634, 2236, 2470, 2795, 3268, 4085, 4940, 5590, 8170, 10621, 11180, 16340, 21242, 42484, 53105, 106210, 212420]

約数ペア:

[(1, 212420), (2, 106210), (4, 53105), (5, 42484), (10, 21242), (13, 16340), (19, 11180), (20, 10621), (26, 8170), (38, 5590), (43, 4940), (52, 4085), (65, 3268), (76, 2795), (86, 2470), (95, 2236), (130, 1634), (172, 1235), (190, 1118), (215, 988), (247, 860), (260, 817), (380, 559), (430, 494)]