21110220

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:261

約数の個数: 120

約数和(自身を含む): 67448304

約数和(自身を除く): 46338084

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 83, 90, 108, 135, 157, 162, 166, 180, 249, 270, 314, 324, 332, 405, 415, 471, 498, 540, 628, 747, 785, 810, 830, 942, 996, 1245, 1413, 1494, 1570, 1620, 1660, 1884, 2241, 2355, 2490, 2826, 2988, 3140, 3735, 4239, 4482, 4710, 4980, 5652, 6723, 7065, 7470, 8478, 8964, 9420, 11205, 12717, 13031, 13446, 14130, 14940, 16956, 21195, 22410, 25434, 26062, 26892, 28260, 33615, 39093, 42390, 44820, 50868, 52124, 63585, 65155, 67230, 78186, 84780, 117279, 127170, 130310, 134460, 156372, 195465, 234558, 254340, 260620, 351837, 390930, 469116, 586395, 703674, 781860, 1055511, 1172790, 1407348, 1759185, 2111022, 2345580, 3518370, 4222044, 5277555, 7036740, 10555110, 21110220]

約数ペア:

[(1, 21110220), (2, 10555110), (3, 7036740), (4, 5277555), (5, 4222044), (6, 3518370), (9, 2345580), (10, 2111022), (12, 1759185), (15, 1407348), (18, 1172790), (20, 1055511), (27, 781860), (30, 703674), (36, 586395), (45, 469116), (54, 390930), (60, 351837), (81, 260620), (83, 254340), (90, 234558), (108, 195465), (135, 156372), (157, 134460), (162, 130310), (166, 127170), (180, 117279), (249, 84780), (270, 78186), (314, 67230), (324, 65155), (332, 63585), (405, 52124), (415, 50868), (471, 44820), (498, 42390), (540, 39093), (628, 33615), (747, 28260), (785, 26892), (810, 26062), (830, 25434), (942, 22410), (996, 21195), (1245, 16956), (1413, 14940), (1494, 14130), (1570, 13446), (1620, 13031), (1660, 12717), (1884, 11205), (2241, 9420), (2355, 8964), (2490, 8478), (2826, 7470), (2988, 7065), (3140, 6723), (3735, 5652), (4239, 4980), (4482, 4710)]