21451620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21031}}^1$

素因数の和:21060

約数の個数: 48

約数和(自身を含む): 63600768

約数和(自身を除く): 42149148

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21031, 42062, 63093, 84124, 105155, 126186, 210310, 252372, 315465, 357527, 420620, 630930, 715054, 1072581, 1261860, 1430108, 1787635, 2145162, 3575270, 4290324, 5362905, 7150540, 10725810, 21451620]

約数ペア:

[(1, 21451620), (2, 10725810), (3, 7150540), (4, 5362905), (5, 4290324), (6, 3575270), (10, 2145162), (12, 1787635), (15, 1430108), (17, 1261860), (20, 1072581), (30, 715054), (34, 630930), (51, 420620), (60, 357527), (68, 315465), (85, 252372), (102, 210310), (170, 126186), (204, 105155), (255, 84124), (340, 63093), (510, 42062), (1020, 21031)]