20863980

素因数分解:

$2^2\times 3^9\times 5^1\times {\mathrm{53}}^1$

素因数の和:89

約数の個数: 120

約数和(自身を含む): 66960432

約数和(自身を除く): 46096452

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 53, 54, 60, 81, 90, 106, 108, 135, 159, 162, 180, 212, 243, 265, 270, 318, 324, 405, 477, 486, 530, 540, 636, 729, 795, 810, 954, 972, 1060, 1215, 1431, 1458, 1590, 1620, 1908, 2187, 2385, 2430, 2862, 2916, 3180, 3645, 4293, 4374, 4770, 4860, 5724, 6561, 7155, 7290, 8586, 8748, 9540, 10935, 12879, 13122, 14310, 14580, 17172, 19683, 21465, 21870, 25758, 26244, 28620, 32805, 38637, 39366, 42930, 43740, 51516, 64395, 65610, 77274, 78732, 85860, 98415, 115911, 128790, 131220, 154548, 193185, 196830, 231822, 257580, 347733, 386370, 393660, 463644, 579555, 695466, 772740, 1043199, 1159110, 1390932, 1738665, 2086398, 2318220, 3477330, 4172796, 5215995, 6954660, 10431990, 20863980]

約数ペア:

[(1, 20863980), (2, 10431990), (3, 6954660), (4, 5215995), (5, 4172796), (6, 3477330), (9, 2318220), (10, 2086398), (12, 1738665), (15, 1390932), (18, 1159110), (20, 1043199), (27, 772740), (30, 695466), (36, 579555), (45, 463644), (53, 393660), (54, 386370), (60, 347733), (81, 257580), (90, 231822), (106, 196830), (108, 193185), (135, 154548), (159, 131220), (162, 128790), (180, 115911), (212, 98415), (243, 85860), (265, 78732), (270, 77274), (318, 65610), (324, 64395), (405, 51516), (477, 43740), (486, 42930), (530, 39366), (540, 38637), (636, 32805), (729, 28620), (795, 26244), (810, 25758), (954, 21870), (972, 21465), (1060, 19683), (1215, 17172), (1431, 14580), (1458, 14310), (1590, 13122), (1620, 12879), (1908, 10935), (2187, 9540), (2385, 8748), (2430, 8586), (2862, 7290), (2916, 7155), (3180, 6561), (3645, 5724), (4293, 4860), (4374, 4770)]