20604740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:181

約数の個数: 96

約数和(自身を含む): 50709120

約数和(自身を除く): 30104380

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 43, 52, 65, 76, 86, 95, 97, 130, 172, 190, 194, 215, 247, 260, 380, 388, 430, 485, 494, 559, 817, 860, 970, 988, 1118, 1235, 1261, 1634, 1843, 1940, 2236, 2470, 2522, 2795, 3268, 3686, 4085, 4171, 4940, 5044, 5590, 6305, 7372, 8170, 8342, 9215, 10621, 11180, 12610, 16340, 16684, 18430, 20855, 21242, 23959, 25220, 36860, 41710, 42484, 47918, 53105, 54223, 79249, 83420, 95836, 106210, 108446, 119795, 158498, 212420, 216892, 239590, 271115, 316996, 396245, 479180, 542230, 792490, 1030237, 1084460, 1584980, 2060474, 4120948, 5151185, 10302370, 20604740]

約数ペア:

[(1, 20604740), (2, 10302370), (4, 5151185), (5, 4120948), (10, 2060474), (13, 1584980), (19, 1084460), (20, 1030237), (26, 792490), (38, 542230), (43, 479180), (52, 396245), (65, 316996), (76, 271115), (86, 239590), (95, 216892), (97, 212420), (130, 158498), (172, 119795), (190, 108446), (194, 106210), (215, 95836), (247, 83420), (260, 79249), (380, 54223), (388, 53105), (430, 47918), (485, 42484), (494, 41710), (559, 36860), (817, 25220), (860, 23959), (970, 21242), (988, 20855), (1118, 18430), (1235, 16684), (1261, 16340), (1634, 12610), (1843, 11180), (1940, 10621), (2236, 9215), (2470, 8342), (2522, 8170), (2795, 7372), (3268, 6305), (3686, 5590), (4085, 5044), (4171, 4940)]