21000984068

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{117563}}^1$

素因数の和:117692

約数の個数: 48

約数和(自身を含む): 40528543104

約数和(自身を除く): 19527559036

約数列:

[1, 2, 4, 17, 34, 37, 68, 71, 74, 142, 148, 284, 629, 1207, 1258, 2414, 2516, 2627, 4828, 5254, 10508, 44659, 89318, 117563, 178636, 235126, 470252, 1998571, 3997142, 4349831, 7994284, 8346973, 8699662, 16693946, 17399324, 33387892, 73947127, 141898541, 147894254, 283797082, 295788508, 308838001, 567594164, 617676002, 1235352004, 5250246017, 10500492034, 21000984068]

約数ペア:

[(1, 21000984068), (2, 10500492034), (4, 5250246017), (17, 1235352004), (34, 617676002), (37, 567594164), (68, 308838001), (71, 295788508), (74, 283797082), (142, 147894254), (148, 141898541), (284, 73947127), (629, 33387892), (1207, 17399324), (1258, 16693946), (2414, 8699662), (2516, 8346973), (2627, 7994284), (4828, 4349831), (5254, 3997142), (10508, 1998571), (44659, 470252), (89318, 235126), (117563, 178636)]