21407940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5171}}^1$

素因数の和:5209

約数の個数: 72

約数和(自身を含む): 67773888

約数和(自身を除く): 46365948

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 5171, 10342, 15513, 20684, 25855, 31026, 46539, 51710, 62052, 77565, 93078, 103420, 118933, 155130, 186156, 232695, 237866, 310260, 356799, 465390, 475732, 594665, 713598, 930780, 1070397, 1189330, 1427196, 1783995, 2140794, 2378660, 3567990, 4281588, 5351985, 7135980, 10703970, 21407940]

約数ペア:

[(1, 21407940), (2, 10703970), (3, 7135980), (4, 5351985), (5, 4281588), (6, 3567990), (9, 2378660), (10, 2140794), (12, 1783995), (15, 1427196), (18, 1189330), (20, 1070397), (23, 930780), (30, 713598), (36, 594665), (45, 475732), (46, 465390), (60, 356799), (69, 310260), (90, 237866), (92, 232695), (115, 186156), (138, 155130), (180, 118933), (207, 103420), (230, 93078), (276, 77565), (345, 62052), (414, 51710), (460, 46539), (690, 31026), (828, 25855), (1035, 20684), (1380, 15513), (2070, 10342), (4140, 5171)]