21474740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1289}}^1$

素因数の和:1329

約数の個数: 72

約数和(自身を含む): 55588680

約数和(自身を除く): 34113940

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1289, 1666, 2380, 2578, 3332, 4165, 5156, 6445, 8330, 9023, 12890, 16660, 18046, 21913, 25780, 36092, 43826, 45115, 63161, 87652, 90230, 109565, 126322, 153391, 180460, 219130, 252644, 306782, 315805, 438260, 613564, 631610, 766955, 1073737, 1263220, 1533910, 2147474, 3067820, 4294948, 5368685, 10737370, 21474740]

約数ペア:

[(1, 21474740), (2, 10737370), (4, 5368685), (5, 4294948), (7, 3067820), (10, 2147474), (14, 1533910), (17, 1263220), (20, 1073737), (28, 766955), (34, 631610), (35, 613564), (49, 438260), (68, 315805), (70, 306782), (85, 252644), (98, 219130), (119, 180460), (140, 153391), (170, 126322), (196, 109565), (238, 90230), (245, 87652), (340, 63161), (476, 45115), (490, 43826), (595, 36092), (833, 25780), (980, 21913), (1190, 18046), (1289, 16660), (1666, 12890), (2380, 9023), (2578, 8330), (3332, 6445), (4165, 5156)]