21855320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{193}}^1$

素因数の和:372

約数の個数: 64

約数和(自身を含む): 52380000

約数和(自身を除く): 30524680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 149, 152, 190, 193, 298, 380, 386, 596, 745, 760, 772, 965, 1192, 1490, 1544, 1930, 2831, 2980, 3667, 3860, 5662, 5960, 7334, 7720, 11324, 14155, 14668, 18335, 22648, 28310, 28757, 29336, 36670, 56620, 57514, 73340, 113240, 115028, 143785, 146680, 230056, 287570, 546383, 575140, 1092766, 1150280, 2185532, 2731915, 4371064, 5463830, 10927660, 21855320]

約数ペア:

[(1, 21855320), (2, 10927660), (4, 5463830), (5, 4371064), (8, 2731915), (10, 2185532), (19, 1150280), (20, 1092766), (38, 575140), (40, 546383), (76, 287570), (95, 230056), (149, 146680), (152, 143785), (190, 115028), (193, 113240), (298, 73340), (380, 57514), (386, 56620), (596, 36670), (745, 29336), (760, 28757), (772, 28310), (965, 22648), (1192, 18335), (1490, 14668), (1544, 14155), (1930, 11324), (2831, 7720), (2980, 7334), (3667, 5960), (3860, 5662)]