20854890

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{4729}}^1$

素因数の和:4756

約数の個数: 72

約数和(自身を含む): 63088740

約数和(自身を除く): 42233850

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 30, 35, 42, 45, 49, 63, 70, 90, 98, 105, 126, 147, 210, 245, 294, 315, 441, 490, 630, 735, 882, 1470, 2205, 4410, 4729, 9458, 14187, 23645, 28374, 33103, 42561, 47290, 66206, 70935, 85122, 99309, 141870, 165515, 198618, 212805, 231721, 297927, 331030, 425610, 463442, 496545, 595854, 695163, 993090, 1158605, 1390326, 1489635, 2085489, 2317210, 2979270, 3475815, 4170978, 6951630, 10427445, 20854890]

約数ペア:

[(1, 20854890), (2, 10427445), (3, 6951630), (5, 4170978), (6, 3475815), (7, 2979270), (9, 2317210), (10, 2085489), (14, 1489635), (15, 1390326), (18, 1158605), (21, 993090), (30, 695163), (35, 595854), (42, 496545), (45, 463442), (49, 425610), (63, 331030), (70, 297927), (90, 231721), (98, 212805), (105, 198618), (126, 165515), (147, 141870), (210, 99309), (245, 85122), (294, 70935), (315, 66206), (441, 47290), (490, 42561), (630, 33103), (735, 28374), (882, 23645), (1470, 14187), (2205, 9458), (4410, 4729)]