21005260

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{331}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 46851840

約数和(自身を除く): 25846580

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 167, 190, 331, 334, 380, 662, 668, 835, 1324, 1655, 1670, 3173, 3310, 3340, 6289, 6346, 6620, 12578, 12692, 15865, 25156, 31445, 31730, 55277, 62890, 63460, 110554, 125780, 221108, 276385, 552770, 1050263, 1105540, 2100526, 4201052, 5251315, 10502630, 21005260]

約数ペア:

[(1, 21005260), (2, 10502630), (4, 5251315), (5, 4201052), (10, 2100526), (19, 1105540), (20, 1050263), (38, 552770), (76, 276385), (95, 221108), (167, 125780), (190, 110554), (331, 63460), (334, 62890), (380, 55277), (662, 31730), (668, 31445), (835, 25156), (1324, 15865), (1655, 12692), (1670, 12578), (3173, 6620), (3310, 6346), (3340, 6289)]