19990640345

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{461}}^1\times {\mathrm{3727}}^1$

素因数の和:4385

約数の個数: 32

約数和(自身を含む): 26041720320

約数和(自身を除く): 6051079975

約数列:

[1, 5, 13, 65, 179, 461, 895, 2305, 2327, 3727, 5993, 11635, 18635, 29965, 48451, 82519, 242255, 412595, 667133, 1072747, 1718147, 3335665, 5363735, 8590735, 8672729, 22335911, 43363645, 111679555, 307548313, 1537741565, 3998128069, 19990640345]

約数ペア:

[(1, 19990640345), (5, 3998128069), (13, 1537741565), (65, 307548313), (179, 111679555), (461, 43363645), (895, 22335911), (2305, 8672729), (2327, 8590735), (3727, 5363735), (5993, 3335665), (11635, 1718147), (18635, 1072747), (29965, 667133), (48451, 412595), (82519, 242255)]