20641569296

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{491}}^1\times {\mathrm{138289}}^1$

素因数の和:138807

約数の個数: 40

約数和(自身を含む): 42183981600

約数和(自身を除く): 21542412304

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 491, 982, 1964, 3928, 7856, 9329, 18658, 37316, 74632, 138289, 149264, 276578, 553156, 1106312, 2212624, 2627491, 5254982, 10509964, 21019928, 42039856, 67899899, 135799798, 271599596, 543199192, 1086398384, 1290098081, 2580196162, 5160392324, 10320784648, 20641569296]

約数ペア:

[(1, 20641569296), (2, 10320784648), (4, 5160392324), (8, 2580196162), (16, 1290098081), (19, 1086398384), (38, 543199192), (76, 271599596), (152, 135799798), (304, 67899899), (491, 42039856), (982, 21019928), (1964, 10509964), (3928, 5254982), (7856, 2627491), (9329, 2212624), (18658, 1106312), (37316, 553156), (74632, 276578), (138289, 149264)]