20216560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2777}}^1$

素因数の和:2810

約数の個数: 80

約数和(自身を含む): 57871296

約数和(自身を除く): 37654736

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2777, 3640, 5554, 7280, 11108, 13885, 19439, 22216, 27770, 36101, 38878, 44432, 55540, 72202, 77756, 97195, 111080, 144404, 155512, 180505, 194390, 222160, 252707, 288808, 311024, 361010, 388780, 505414, 577616, 722020, 777560, 1010828, 1263535, 1444040, 1555120, 2021656, 2527070, 2888080, 4043312, 5054140, 10108280, 20216560]

約数ペア:

[(1, 20216560), (2, 10108280), (4, 5054140), (5, 4043312), (7, 2888080), (8, 2527070), (10, 2021656), (13, 1555120), (14, 1444040), (16, 1263535), (20, 1010828), (26, 777560), (28, 722020), (35, 577616), (40, 505414), (52, 388780), (56, 361010), (65, 311024), (70, 288808), (80, 252707), (91, 222160), (104, 194390), (112, 180505), (130, 155512), (140, 144404), (182, 111080), (208, 97195), (260, 77756), (280, 72202), (364, 55540), (455, 44432), (520, 38878), (560, 36101), (728, 27770), (910, 22216), (1040, 19439), (1456, 13885), (1820, 11108), (2777, 7280), (3640, 5554)]