21755228

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{491}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 22879012

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 53, 76, 106, 209, 212, 418, 491, 583, 836, 982, 1007, 1166, 1964, 2014, 2332, 4028, 5401, 9329, 10802, 11077, 18658, 21604, 22154, 26023, 37316, 44308, 52046, 102619, 104092, 205238, 286253, 410476, 494437, 572506, 988874, 1145012, 1977748, 5438807, 10877614, 21755228]

約数ペア:

[(1, 21755228), (2, 10877614), (4, 5438807), (11, 1977748), (19, 1145012), (22, 988874), (38, 572506), (44, 494437), (53, 410476), (76, 286253), (106, 205238), (209, 104092), (212, 102619), (418, 52046), (491, 44308), (583, 37316), (836, 26023), (982, 22154), (1007, 21604), (1166, 18658), (1964, 11077), (2014, 10802), (2332, 9329), (4028, 5401)]