18340840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2113}}^1$

素因数の和:2162

約数の個数: 64

約数和(自身を含む): 48706560

約数和(自身を除く): 30365720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2113, 2170, 4226, 4340, 8452, 8680, 10565, 14791, 16904, 21130, 29582, 42260, 59164, 65503, 73955, 84520, 118328, 131006, 147910, 262012, 295820, 327515, 458521, 524024, 591640, 655030, 917042, 1310060, 1834084, 2292605, 2620120, 3668168, 4585210, 9170420, 18340840]

約数ペア:

[(1, 18340840), (2, 9170420), (4, 4585210), (5, 3668168), (7, 2620120), (8, 2292605), (10, 1834084), (14, 1310060), (20, 917042), (28, 655030), (31, 591640), (35, 524024), (40, 458521), (56, 327515), (62, 295820), (70, 262012), (124, 147910), (140, 131006), (155, 118328), (217, 84520), (248, 73955), (280, 65503), (310, 59164), (434, 42260), (620, 29582), (868, 21130), (1085, 16904), (1240, 14791), (1736, 10565), (2113, 8680), (2170, 8452), (4226, 4340)]