21183840

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{313}}^1$

素因数の和:381

約数の個数: 144

約数和(自身を含む): 74063808

約数和(自身を除く): 52879968

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 47, 48, 60, 72, 80, 90, 94, 96, 120, 141, 144, 160, 180, 188, 235, 240, 282, 288, 313, 360, 376, 423, 470, 480, 564, 626, 705, 720, 752, 846, 939, 940, 1128, 1252, 1410, 1440, 1504, 1565, 1692, 1878, 1880, 2115, 2256, 2504, 2817, 2820, 3130, 3384, 3756, 3760, 4230, 4512, 4695, 5008, 5634, 5640, 6260, 6768, 7512, 7520, 8460, 9390, 10016, 11268, 11280, 12520, 13536, 14085, 14711, 15024, 16920, 18780, 22536, 22560, 25040, 28170, 29422, 30048, 33840, 37560, 44133, 45072, 50080, 56340, 58844, 67680, 73555, 75120, 88266, 90144, 112680, 117688, 132399, 147110, 150240, 176532, 220665, 225360, 235376, 264798, 294220, 353064, 441330, 450720, 470752, 529596, 588440, 661995, 706128, 882660, 1059192, 1176880, 1323990, 1412256, 1765320, 2118384, 2353760, 2647980, 3530640, 4236768, 5295960, 7061280, 10591920, 21183840]

約数ペア:

[(1, 21183840), (2, 10591920), (3, 7061280), (4, 5295960), (5, 4236768), (6, 3530640), (8, 2647980), (9, 2353760), (10, 2118384), (12, 1765320), (15, 1412256), (16, 1323990), (18, 1176880), (20, 1059192), (24, 882660), (30, 706128), (32, 661995), (36, 588440), (40, 529596), (45, 470752), (47, 450720), (48, 441330), (60, 353064), (72, 294220), (80, 264798), (90, 235376), (94, 225360), (96, 220665), (120, 176532), (141, 150240), (144, 147110), (160, 132399), (180, 117688), (188, 112680), (235, 90144), (240, 88266), (282, 75120), (288, 73555), (313, 67680), (360, 58844), (376, 56340), (423, 50080), (470, 45072), (480, 44133), (564, 37560), (626, 33840), (705, 30048), (720, 29422), (752, 28170), (846, 25040), (939, 22560), (940, 22536), (1128, 18780), (1252, 16920), (1410, 15024), (1440, 14711), (1504, 14085), (1565, 13536), (1692, 12520), (1878, 11280), (1880, 11268), (2115, 10016), (2256, 9390), (2504, 8460), (2817, 7520), (2820, 7512), (3130, 6768), (3384, 6260), (3756, 5640), (3760, 5634), (4230, 5008), (4512, 4695)]