19777480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{491}}^1$

素因数の和:574

約数の個数: 64

約数和(自身を含む): 47822400

約数和(自身を除く): 28044920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 53, 76, 95, 106, 152, 190, 212, 265, 380, 424, 491, 530, 760, 982, 1007, 1060, 1964, 2014, 2120, 2455, 3928, 4028, 4910, 5035, 8056, 9329, 9820, 10070, 18658, 19640, 20140, 26023, 37316, 40280, 46645, 52046, 74632, 93290, 104092, 130115, 186580, 208184, 260230, 373160, 494437, 520460, 988874, 1040920, 1977748, 2472185, 3955496, 4944370, 9888740, 19777480]

約数ペア:

[(1, 19777480), (2, 9888740), (4, 4944370), (5, 3955496), (8, 2472185), (10, 1977748), (19, 1040920), (20, 988874), (38, 520460), (40, 494437), (53, 373160), (76, 260230), (95, 208184), (106, 186580), (152, 130115), (190, 104092), (212, 93290), (265, 74632), (380, 52046), (424, 46645), (491, 40280), (530, 37316), (760, 26023), (982, 20140), (1007, 19640), (1060, 18658), (1964, 10070), (2014, 9820), (2120, 9329), (2455, 8056), (3928, 5035), (4028, 4910)]