21349980

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:238

約数の個数: 144

約数和(自身を含む): 70447104

約数和(自身を除く): 49097124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 27, 30, 36, 45, 46, 54, 60, 69, 81, 90, 92, 108, 115, 135, 138, 162, 180, 191, 207, 230, 243, 270, 276, 324, 345, 382, 405, 414, 460, 486, 540, 573, 621, 690, 764, 810, 828, 955, 972, 1035, 1146, 1215, 1242, 1380, 1620, 1719, 1863, 1910, 2070, 2292, 2430, 2484, 2865, 3105, 3438, 3726, 3820, 4140, 4393, 4860, 5157, 5589, 5730, 6210, 6876, 7452, 8595, 8786, 9315, 10314, 11178, 11460, 12420, 13179, 15471, 17190, 17572, 18630, 20628, 21965, 22356, 25785, 26358, 27945, 30942, 34380, 37260, 39537, 43930, 46413, 51570, 52716, 55890, 61884, 65895, 77355, 79074, 87860, 92826, 103140, 111780, 118611, 131790, 154710, 158148, 185652, 197685, 232065, 237222, 263580, 309420, 355833, 395370, 464130, 474444, 593055, 711666, 790740, 928260, 1067499, 1186110, 1423332, 1779165, 2134998, 2372220, 3558330, 4269996, 5337495, 7116660, 10674990, 21349980]

約数ペア:

[(1, 21349980), (2, 10674990), (3, 7116660), (4, 5337495), (5, 4269996), (6, 3558330), (9, 2372220), (10, 2134998), (12, 1779165), (15, 1423332), (18, 1186110), (20, 1067499), (23, 928260), (27, 790740), (30, 711666), (36, 593055), (45, 474444), (46, 464130), (54, 395370), (60, 355833), (69, 309420), (81, 263580), (90, 237222), (92, 232065), (108, 197685), (115, 185652), (135, 158148), (138, 154710), (162, 131790), (180, 118611), (191, 111780), (207, 103140), (230, 92826), (243, 87860), (270, 79074), (276, 77355), (324, 65895), (345, 61884), (382, 55890), (405, 52716), (414, 51570), (460, 46413), (486, 43930), (540, 39537), (573, 37260), (621, 34380), (690, 30942), (764, 27945), (810, 26358), (828, 25785), (955, 22356), (972, 21965), (1035, 20628), (1146, 18630), (1215, 17572), (1242, 17190), (1380, 15471), (1620, 13179), (1719, 12420), (1863, 11460), (1910, 11178), (2070, 10314), (2292, 9315), (2430, 8786), (2484, 8595), (2865, 7452), (3105, 6876), (3438, 6210), (3726, 5730), (3820, 5589), (4140, 5157), (4393, 4860)]