19379980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 23076980

約数列:

[1, 2, 4, 5, 10, 20, 47, 53, 94, 106, 188, 212, 235, 265, 389, 470, 530, 778, 940, 1060, 1556, 1945, 2491, 3890, 4982, 7780, 9964, 12455, 18283, 20617, 24910, 36566, 41234, 49820, 73132, 82468, 91415, 103085, 182830, 206170, 365660, 412340, 968999, 1937998, 3875996, 4844995, 9689990, 19379980]

約数ペア:

[(1, 19379980), (2, 9689990), (4, 4844995), (5, 3875996), (10, 1937998), (20, 968999), (47, 412340), (53, 365660), (94, 206170), (106, 182830), (188, 103085), (212, 91415), (235, 82468), (265, 73132), (389, 49820), (470, 41234), (530, 36566), (778, 24910), (940, 20617), (1060, 18283), (1556, 12455), (1945, 9964), (2491, 7780), (3890, 4982)]