21000322588

素因数分解:

$2^2\times 7^2\times {\mathrm{241}}^1\times {\mathrm{409}}^1\times {\mathrm{1087}}^1$

素因数の和:1755

約数の個数: 72

約数和(自身を含む): 43072592640

約数和(自身を除く): 22072270052

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 241, 409, 482, 818, 964, 1087, 1636, 1687, 2174, 2863, 3374, 4348, 5726, 6748, 7609, 11452, 11809, 15218, 20041, 23618, 30436, 40082, 47236, 53263, 80164, 98569, 106526, 197138, 213052, 261967, 394276, 444583, 523934, 689983, 889166, 1047868, 1379966, 1778332, 1833769, 2759932, 3112081, 3667538, 4829881, 6224162, 7335076, 9659762, 12448324, 12836383, 19319524, 21784567, 25672766, 43569134, 51345532, 87138268, 107144503, 214289006, 428578012, 750011521, 1500023042, 3000046084, 5250080647, 10500161294, 21000322588]

約数ペア:

[(1, 21000322588), (2, 10500161294), (4, 5250080647), (7, 3000046084), (14, 1500023042), (28, 750011521), (49, 428578012), (98, 214289006), (196, 107144503), (241, 87138268), (409, 51345532), (482, 43569134), (818, 25672766), (964, 21784567), (1087, 19319524), (1636, 12836383), (1687, 12448324), (2174, 9659762), (2863, 7335076), (3374, 6224162), (4348, 4829881), (5726, 3667538), (6748, 3112081), (7609, 2759932), (11452, 1833769), (11809, 1778332), (15218, 1379966), (20041, 1047868), (23618, 889166), (30436, 689983), (40082, 523934), (47236, 444583), (53263, 394276), (80164, 261967), (98569, 213052), (106526, 197138)]