21555540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3863}}^1$

素因数の和:3909

約数の個数: 72

約数和(自身を含む): 67511808

約数和(自身を除く): 45956268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 31, 36, 45, 60, 62, 90, 93, 124, 155, 180, 186, 279, 310, 372, 465, 558, 620, 930, 1116, 1395, 1860, 2790, 3863, 5580, 7726, 11589, 15452, 19315, 23178, 34767, 38630, 46356, 57945, 69534, 77260, 115890, 119753, 139068, 173835, 231780, 239506, 347670, 359259, 479012, 598765, 695340, 718518, 1077777, 1197530, 1437036, 1796295, 2155554, 2395060, 3592590, 4311108, 5388885, 7185180, 10777770, 21555540]

約数ペア:

[(1, 21555540), (2, 10777770), (3, 7185180), (4, 5388885), (5, 4311108), (6, 3592590), (9, 2395060), (10, 2155554), (12, 1796295), (15, 1437036), (18, 1197530), (20, 1077777), (30, 718518), (31, 695340), (36, 598765), (45, 479012), (60, 359259), (62, 347670), (90, 239506), (93, 231780), (124, 173835), (155, 139068), (180, 119753), (186, 115890), (279, 77260), (310, 69534), (372, 57945), (465, 46356), (558, 38630), (620, 34767), (930, 23178), (1116, 19315), (1395, 15452), (1860, 11589), (2790, 7726), (3863, 5580)]