28639980

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:178

約数の個数: 144

約数和(自身を含む): 92461824

約数和(自身を除く): 63821844

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 71, 81, 83, 90, 108, 135, 142, 162, 166, 180, 213, 243, 249, 270, 284, 324, 332, 355, 405, 415, 426, 486, 498, 540, 639, 710, 747, 810, 830, 852, 972, 996, 1065, 1215, 1245, 1278, 1420, 1494, 1620, 1660, 1917, 2130, 2241, 2430, 2490, 2556, 2988, 3195, 3735, 3834, 4260, 4482, 4860, 4980, 5751, 5893, 6390, 6723, 7470, 7668, 8964, 9585, 11205, 11502, 11786, 12780, 13446, 14940, 17253, 17679, 19170, 20169, 22410, 23004, 23572, 26892, 28755, 29465, 33615, 34506, 35358, 38340, 40338, 44820, 53037, 57510, 58930, 67230, 69012, 70716, 80676, 86265, 88395, 100845, 106074, 115020, 117860, 134460, 159111, 172530, 176790, 201690, 212148, 265185, 318222, 345060, 353580, 403380, 477333, 530370, 636444, 795555, 954666, 1060740, 1431999, 1591110, 1909332, 2386665, 2863998, 3182220, 4773330, 5727996, 7159995, 9546660, 14319990, 28639980]

約数ペア:

[(1, 28639980), (2, 14319990), (3, 9546660), (4, 7159995), (5, 5727996), (6, 4773330), (9, 3182220), (10, 2863998), (12, 2386665), (15, 1909332), (18, 1591110), (20, 1431999), (27, 1060740), (30, 954666), (36, 795555), (45, 636444), (54, 530370), (60, 477333), (71, 403380), (81, 353580), (83, 345060), (90, 318222), (108, 265185), (135, 212148), (142, 201690), (162, 176790), (166, 172530), (180, 159111), (213, 134460), (243, 117860), (249, 115020), (270, 106074), (284, 100845), (324, 88395), (332, 86265), (355, 80676), (405, 70716), (415, 69012), (426, 67230), (486, 58930), (498, 57510), (540, 53037), (639, 44820), (710, 40338), (747, 38340), (810, 35358), (830, 34506), (852, 33615), (972, 29465), (996, 28755), (1065, 26892), (1215, 23572), (1245, 23004), (1278, 22410), (1420, 20169), (1494, 19170), (1620, 17679), (1660, 17253), (1917, 14940), (2130, 13446), (2241, 12780), (2430, 11786), (2490, 11502), (2556, 11205), (2988, 9585), (3195, 8964), (3735, 7668), (3834, 7470), (4260, 6723), (4482, 6390), (4860, 5893), (4980, 5751)]