21654740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{659}}^1$

素因数の和:752

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26245420

約数列:

[1, 2, 4, 5, 10, 20, 31, 53, 62, 106, 124, 155, 212, 265, 310, 530, 620, 659, 1060, 1318, 1643, 2636, 3286, 3295, 6572, 6590, 8215, 13180, 16430, 20429, 32860, 34927, 40858, 69854, 81716, 102145, 139708, 174635, 204290, 349270, 408580, 698540, 1082737, 2165474, 4330948, 5413685, 10827370, 21654740]

約数ペア:

[(1, 21654740), (2, 10827370), (4, 5413685), (5, 4330948), (10, 2165474), (20, 1082737), (31, 698540), (53, 408580), (62, 349270), (106, 204290), (124, 174635), (155, 139708), (212, 102145), (265, 81716), (310, 69854), (530, 40858), (620, 34927), (659, 32860), (1060, 20429), (1318, 16430), (1643, 13180), (2636, 8215), (3286, 6590), (3295, 6572)]