21962780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{307}}^1$

素因数の和:403

約数の個数: 72

約数和(自身を含む): 54564048

約数和(自身を除く): 32601268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 73, 98, 140, 146, 196, 245, 292, 307, 365, 490, 511, 614, 730, 980, 1022, 1228, 1460, 1535, 2044, 2149, 2555, 3070, 3577, 4298, 5110, 6140, 7154, 8596, 10220, 10745, 14308, 15043, 17885, 21490, 22411, 30086, 35770, 42980, 44822, 60172, 71540, 75215, 89644, 112055, 150430, 156877, 224110, 300860, 313754, 448220, 627508, 784385, 1098139, 1568770, 2196278, 3137540, 4392556, 5490695, 10981390, 21962780]

約数ペア:

[(1, 21962780), (2, 10981390), (4, 5490695), (5, 4392556), (7, 3137540), (10, 2196278), (14, 1568770), (20, 1098139), (28, 784385), (35, 627508), (49, 448220), (70, 313754), (73, 300860), (98, 224110), (140, 156877), (146, 150430), (196, 112055), (245, 89644), (292, 75215), (307, 71540), (365, 60172), (490, 44822), (511, 42980), (614, 35770), (730, 30086), (980, 22411), (1022, 21490), (1228, 17885), (1460, 15043), (1535, 14308), (2044, 10745), (2149, 10220), (2555, 8596), (3070, 7154), (3577, 6140), (4298, 5110)]