639843620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2\times {\mathrm{401}}^1$

素因数の和:478

約数の個数: 144

約数和(自身を含む): 1621066608

約数和(自身を除く): 981222988

約数列:

[1, 2, 4, 5, 10, 13, 17, 19, 20, 26, 34, 38, 52, 65, 68, 76, 85, 95, 130, 170, 190, 221, 247, 260, 323, 340, 361, 380, 401, 442, 494, 646, 722, 802, 884, 988, 1105, 1235, 1292, 1444, 1604, 1615, 1805, 2005, 2210, 2470, 3230, 3610, 4010, 4199, 4420, 4693, 4940, 5213, 6137, 6460, 6817, 7220, 7619, 8020, 8398, 9386, 10426, 12274, 13634, 15238, 16796, 18772, 20852, 20995, 23465, 24548, 26065, 27268, 30476, 30685, 34085, 38095, 41990, 46930, 52130, 61370, 68170, 76190, 79781, 83980, 88621, 93860, 99047, 104260, 122740, 129523, 136340, 144761, 152380, 159562, 177242, 198094, 259046, 289522, 319124, 354484, 396188, 398905, 443105, 495235, 518092, 579044, 647615, 723805, 797810, 886210, 990470, 1295230, 1447610, 1595620, 1683799, 1772420, 1881893, 1980940, 2460937, 2590460, 2895220, 3367598, 3763786, 4921874, 6735196, 7527572, 8418995, 9409465, 9843748, 12304685, 16837990, 18818930, 24609370, 31992181, 33675980, 37637860, 49218740, 63984362, 127968724, 159960905, 319921810, 639843620]

約数ペア:

[(1, 639843620), (2, 319921810), (4, 159960905), (5, 127968724), (10, 63984362), (13, 49218740), (17, 37637860), (19, 33675980), (20, 31992181), (26, 24609370), (34, 18818930), (38, 16837990), (52, 12304685), (65, 9843748), (68, 9409465), (76, 8418995), (85, 7527572), (95, 6735196), (130, 4921874), (170, 3763786), (190, 3367598), (221, 2895220), (247, 2590460), (260, 2460937), (323, 1980940), (340, 1881893), (361, 1772420), (380, 1683799), (401, 1595620), (442, 1447610), (494, 1295230), (646, 990470), (722, 886210), (802, 797810), (884, 723805), (988, 647615), (1105, 579044), (1235, 518092), (1292, 495235), (1444, 443105), (1604, 398905), (1615, 396188), (1805, 354484), (2005, 319124), (2210, 289522), (2470, 259046), (3230, 198094), (3610, 177242), (4010, 159562), (4199, 152380), (4420, 144761), (4693, 136340), (4940, 129523), (5213, 122740), (6137, 104260), (6460, 99047), (6817, 93860), (7220, 88621), (7619, 83980), (8020, 79781), (8398, 76190), (9386, 68170), (10426, 61370), (12274, 52130), (13634, 46930), (15238, 41990), (16796, 38095), (18772, 34085), (20852, 30685), (20995, 30476), (23465, 27268), (24548, 26065)]