21000339404

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{15647}}^1$

素因数の和:15779

約数の個数: 72

約数和(自身を含む): 41956669440

約数和(自身を除く): 20956330036

約数列:

[1, 2, 4, 11, 22, 44, 47, 59, 94, 118, 121, 188, 236, 242, 484, 517, 649, 1034, 1298, 2068, 2596, 2773, 5546, 5687, 7139, 11092, 11374, 14278, 15647, 22748, 28556, 30503, 31294, 61006, 62588, 122012, 172117, 335533, 344234, 671066, 688468, 735409, 923173, 1342132, 1470818, 1846346, 1893287, 2941636, 3692692, 3786574, 7573148, 8089499, 10154903, 16178998, 20309806, 32357996, 40619612, 43389131, 86778262, 88984489, 111703933, 173556524, 177968978, 223407866, 355937956, 446815732, 477280441, 954560882, 1909121764, 5250084851, 10500169702, 21000339404]

約数ペア:

[(1, 21000339404), (2, 10500169702), (4, 5250084851), (11, 1909121764), (22, 954560882), (44, 477280441), (47, 446815732), (59, 355937956), (94, 223407866), (118, 177968978), (121, 173556524), (188, 111703933), (236, 88984489), (242, 86778262), (484, 43389131), (517, 40619612), (649, 32357996), (1034, 20309806), (1298, 16178998), (2068, 10154903), (2596, 8089499), (2773, 7573148), (5546, 3786574), (5687, 3692692), (7139, 2941636), (11092, 1893287), (11374, 1846346), (14278, 1470818), (15647, 1342132), (22748, 923173), (28556, 735409), (30503, 688468), (31294, 671066), (61006, 344234), (62588, 335533), (122012, 172117)]