21550860

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{251}}^1$

素因数の和:325

約数の個数: 120

約数和(自身を含む): 69155856

約数和(自身を除く): 47604996

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, 251, 265, 270, 318, 324, 405, 477, 502, 530, 540, 636, 753, 795, 810, 954, 1004, 1060, 1255, 1431, 1506, 1590, 1620, 1908, 2259, 2385, 2510, 2862, 3012, 3180, 3765, 4293, 4518, 4770, 5020, 5724, 6777, 7155, 7530, 8586, 9036, 9540, 11295, 13303, 13554, 14310, 15060, 17172, 20331, 21465, 22590, 26606, 27108, 28620, 33885, 39909, 40662, 42930, 45180, 53212, 66515, 67770, 79818, 81324, 85860, 101655, 119727, 133030, 135540, 159636, 199545, 203310, 239454, 266060, 359181, 399090, 406620, 478908, 598635, 718362, 798180, 1077543, 1197270, 1436724, 1795905, 2155086, 2394540, 3591810, 4310172, 5387715, 7183620, 10775430, 21550860]

約数ペア:

[(1, 21550860), (2, 10775430), (3, 7183620), (4, 5387715), (5, 4310172), (6, 3591810), (9, 2394540), (10, 2155086), (12, 1795905), (15, 1436724), (18, 1197270), (20, 1077543), (27, 798180), (30, 718362), (36, 598635), (45, 478908), (53, 406620), (54, 399090), (60, 359181), (81, 266060), (90, 239454), (106, 203310), (108, 199545), (135, 159636), (159, 135540), (162, 133030), (180, 119727), (212, 101655), (251, 85860), (265, 81324), (270, 79818), (318, 67770), (324, 66515), (405, 53212), (477, 45180), (502, 42930), (530, 40662), (540, 39909), (636, 33885), (753, 28620), (795, 27108), (810, 26606), (954, 22590), (1004, 21465), (1060, 20331), (1255, 17172), (1431, 15060), (1506, 14310), (1590, 13554), (1620, 13303), (1908, 11295), (2259, 9540), (2385, 9036), (2510, 8586), (2862, 7530), (3012, 7155), (3180, 6777), (3765, 5724), (4293, 5020), (4518, 4770)]