21486220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{919}}^1$

素因数の和:1102

約数の個数: 48

約数和(自身を含む): 51932160

約数和(自身を除く): 30445940

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 167, 334, 668, 835, 919, 1169, 1670, 1838, 2338, 3340, 3676, 4595, 4676, 5845, 6433, 9190, 11690, 12866, 18380, 23380, 25732, 32165, 64330, 128660, 153473, 306946, 613892, 767365, 1074311, 1534730, 2148622, 3069460, 4297244, 5371555, 10743110, 21486220]

約数ペア:

[(1, 21486220), (2, 10743110), (4, 5371555), (5, 4297244), (7, 3069460), (10, 2148622), (14, 1534730), (20, 1074311), (28, 767365), (35, 613892), (70, 306946), (140, 153473), (167, 128660), (334, 64330), (668, 32165), (835, 25732), (919, 23380), (1169, 18380), (1670, 12866), (1838, 11690), (2338, 9190), (3340, 6433), (3676, 5845), (4595, 4676)]