21216240

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{373}}^1$

素因数の和:471

約数の個数: 120

約数和(自身を含む): 72346560

約数和(自身を除く): 51130320

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 79, 80, 90, 120, 144, 158, 180, 237, 240, 316, 360, 373, 395, 474, 632, 711, 720, 746, 790, 948, 1119, 1185, 1264, 1422, 1492, 1580, 1865, 1896, 2238, 2370, 2844, 2984, 3160, 3357, 3555, 3730, 3792, 4476, 4740, 5595, 5688, 5968, 6320, 6714, 7110, 7460, 8952, 9480, 11190, 11376, 13428, 14220, 14920, 16785, 17904, 18960, 22380, 26856, 28440, 29467, 29840, 33570, 44760, 53712, 56880, 58934, 67140, 88401, 89520, 117868, 134280, 147335, 176802, 235736, 265203, 268560, 294670, 353604, 442005, 471472, 530406, 589340, 707208, 884010, 1060812, 1178680, 1326015, 1414416, 1768020, 2121624, 2357360, 2652030, 3536040, 4243248, 5304060, 7072080, 10608120, 21216240]

約数ペア:

[(1, 21216240), (2, 10608120), (3, 7072080), (4, 5304060), (5, 4243248), (6, 3536040), (8, 2652030), (9, 2357360), (10, 2121624), (12, 1768020), (15, 1414416), (16, 1326015), (18, 1178680), (20, 1060812), (24, 884010), (30, 707208), (36, 589340), (40, 530406), (45, 471472), (48, 442005), (60, 353604), (72, 294670), (79, 268560), (80, 265203), (90, 235736), (120, 176802), (144, 147335), (158, 134280), (180, 117868), (237, 89520), (240, 88401), (316, 67140), (360, 58934), (373, 56880), (395, 53712), (474, 44760), (632, 33570), (711, 29840), (720, 29467), (746, 28440), (790, 26856), (948, 22380), (1119, 18960), (1185, 17904), (1264, 16785), (1422, 14920), (1492, 14220), (1580, 13428), (1865, 11376), (1896, 11190), (2238, 9480), (2370, 8952), (2844, 7460), (2984, 7110), (3160, 6714), (3357, 6320), (3555, 5968), (3730, 5688), (3792, 5595), (4476, 4740)]