20865790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 43960320

約数和(自身を除く): 23094530

約数列:

[1, 2, 5, 10, 11, 22, 29, 31, 55, 58, 62, 110, 145, 155, 211, 290, 310, 319, 341, 422, 638, 682, 899, 1055, 1595, 1705, 1798, 2110, 2321, 3190, 3410, 4495, 4642, 6119, 6541, 8990, 9889, 11605, 12238, 13082, 19778, 23210, 30595, 32705, 49445, 61190, 65410, 67309, 71951, 98890, 134618, 143902, 189689, 336545, 359755, 379378, 673090, 719510, 948445, 1896890, 2086579, 4173158, 10432895, 20865790]

約数ペア:

[(1, 20865790), (2, 10432895), (5, 4173158), (10, 2086579), (11, 1896890), (22, 948445), (29, 719510), (31, 673090), (55, 379378), (58, 359755), (62, 336545), (110, 189689), (145, 143902), (155, 134618), (211, 98890), (290, 71951), (310, 67309), (319, 65410), (341, 61190), (422, 49445), (638, 32705), (682, 30595), (899, 23210), (1055, 19778), (1595, 13082), (1705, 12238), (1798, 11605), (2110, 9889), (2321, 8990), (3190, 6541), (3410, 6119), (4495, 4642)]