19821440

素因数分解:

$2^7\times 5^1\times {\mathrm{30971}}^1$

素因数の和:30990

約数の個数: 32

約数和(自身を含む): 47387160

約数和(自身を除く): 27565720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 30971, 61942, 123884, 154855, 247768, 309710, 495536, 619420, 991072, 1238840, 1982144, 2477680, 3964288, 4955360, 9910720, 19821440]

約数ペア:

[(1, 19821440), (2, 9910720), (4, 4955360), (5, 3964288), (8, 2477680), (10, 1982144), (16, 1238840), (20, 991072), (32, 619420), (40, 495536), (64, 309710), (80, 247768), (128, 154855), (160, 123884), (320, 61942), (640, 30971)]