19800560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{241}}^1$

素因数の和:346

約数の個数: 80

約数和(自身を含む): 50413440

約数和(自身を除く): 30612880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 79, 80, 104, 130, 158, 208, 241, 260, 316, 395, 482, 520, 632, 790, 964, 1027, 1040, 1205, 1264, 1580, 1928, 2054, 2410, 3133, 3160, 3856, 4108, 4820, 5135, 6266, 6320, 8216, 9640, 10270, 12532, 15665, 16432, 19039, 19280, 20540, 25064, 31330, 38078, 41080, 50128, 62660, 76156, 82160, 95195, 125320, 152312, 190390, 247507, 250640, 304624, 380780, 495014, 761560, 990028, 1237535, 1523120, 1980056, 2475070, 3960112, 4950140, 9900280, 19800560]

約数ペア:

[(1, 19800560), (2, 9900280), (4, 4950140), (5, 3960112), (8, 2475070), (10, 1980056), (13, 1523120), (16, 1237535), (20, 990028), (26, 761560), (40, 495014), (52, 380780), (65, 304624), (79, 250640), (80, 247507), (104, 190390), (130, 152312), (158, 125320), (208, 95195), (241, 82160), (260, 76156), (316, 62660), (395, 50128), (482, 41080), (520, 38078), (632, 31330), (790, 25064), (964, 20540), (1027, 19280), (1040, 19039), (1205, 16432), (1264, 15665), (1580, 12532), (1928, 10270), (2054, 9640), (2410, 8216), (3133, 6320), (3160, 6266), (3856, 5135), (4108, 4820)]