19805680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{14563}}^1$

素因数の和:14593

約数の個数: 40

約数和(自身を含む): 48760272

約数和(自身を除く): 28954592

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 14563, 29126, 58252, 72815, 116504, 145630, 233008, 247571, 291260, 495142, 582520, 990284, 1165040, 1237855, 1980568, 2475710, 3961136, 4951420, 9902840, 19805680]

約数ペア:

[(1, 19805680), (2, 9902840), (4, 4951420), (5, 3961136), (8, 2475710), (10, 1980568), (16, 1237855), (17, 1165040), (20, 990284), (34, 582520), (40, 495142), (68, 291260), (80, 247571), (85, 233008), (136, 145630), (170, 116504), (272, 72815), (340, 58252), (680, 29126), (1360, 14563)]