20475540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{5987}}^1$

素因数の和:6021

約数の個数: 72

約数和(自身を含む): 65388960

約数和(自身を除く): 44913420

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 570, 684, 855, 1140, 1710, 3420, 5987, 11974, 17961, 23948, 29935, 35922, 53883, 59870, 71844, 89805, 107766, 113753, 119740, 179610, 215532, 227506, 269415, 341259, 359220, 455012, 538830, 568765, 682518, 1023777, 1077660, 1137530, 1365036, 1706295, 2047554, 2275060, 3412590, 4095108, 5118885, 6825180, 10237770, 20475540]

約数ペア:

[(1, 20475540), (2, 10237770), (3, 6825180), (4, 5118885), (5, 4095108), (6, 3412590), (9, 2275060), (10, 2047554), (12, 1706295), (15, 1365036), (18, 1137530), (19, 1077660), (20, 1023777), (30, 682518), (36, 568765), (38, 538830), (45, 455012), (57, 359220), (60, 341259), (76, 269415), (90, 227506), (95, 215532), (114, 179610), (171, 119740), (180, 113753), (190, 107766), (228, 89805), (285, 71844), (342, 59870), (380, 53883), (570, 35922), (684, 29935), (855, 23948), (1140, 17961), (1710, 11974), (3420, 5987)]