21239040

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{5531}}^1$

素因数の和:5555

約数の個数: 72

約数和(自身を含む): 67844448

約数和(自身を除く): 46605408

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 160, 192, 240, 256, 320, 384, 480, 640, 768, 960, 1280, 1920, 3840, 5531, 11062, 16593, 22124, 27655, 33186, 44248, 55310, 66372, 82965, 88496, 110620, 132744, 165930, 176992, 221240, 265488, 331860, 353984, 442480, 530976, 663720, 707968, 884960, 1061952, 1327440, 1415936, 1769920, 2123904, 2654880, 3539840, 4247808, 5309760, 7079680, 10619520, 21239040]

約数ペア:

[(1, 21239040), (2, 10619520), (3, 7079680), (4, 5309760), (5, 4247808), (6, 3539840), (8, 2654880), (10, 2123904), (12, 1769920), (15, 1415936), (16, 1327440), (20, 1061952), (24, 884960), (30, 707968), (32, 663720), (40, 530976), (48, 442480), (60, 353984), (64, 331860), (80, 265488), (96, 221240), (120, 176992), (128, 165930), (160, 132744), (192, 110620), (240, 88496), (256, 82965), (320, 66372), (384, 55310), (480, 44248), (640, 33186), (768, 27655), (960, 22124), (1280, 16593), (1920, 11062), (3840, 5531)]