19902720

素因数分解:

$2^8\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 144

約数和(自身を含む): 65342592

約数和(自身を除く): 45439872

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 71, 73, 80, 96, 120, 128, 142, 146, 160, 192, 213, 219, 240, 256, 284, 292, 320, 355, 365, 384, 426, 438, 480, 568, 584, 640, 710, 730, 768, 852, 876, 960, 1065, 1095, 1136, 1168, 1280, 1420, 1460, 1704, 1752, 1920, 2130, 2190, 2272, 2336, 2840, 2920, 3408, 3504, 3840, 4260, 4380, 4544, 4672, 5183, 5680, 5840, 6816, 7008, 8520, 8760, 9088, 9344, 10366, 11360, 11680, 13632, 14016, 15549, 17040, 17520, 18176, 18688, 20732, 22720, 23360, 25915, 27264, 28032, 31098, 34080, 35040, 41464, 45440, 46720, 51830, 54528, 56064, 62196, 68160, 70080, 77745, 82928, 90880, 93440, 103660, 124392, 136320, 140160, 155490, 165856, 207320, 248784, 272640, 280320, 310980, 331712, 414640, 497568, 621960, 663424, 829280, 995136, 1243920, 1326848, 1658560, 1990272, 2487840, 3317120, 3980544, 4975680, 6634240, 9951360, 19902720]

約数ペア:

[(1, 19902720), (2, 9951360), (3, 6634240), (4, 4975680), (5, 3980544), (6, 3317120), (8, 2487840), (10, 1990272), (12, 1658560), (15, 1326848), (16, 1243920), (20, 995136), (24, 829280), (30, 663424), (32, 621960), (40, 497568), (48, 414640), (60, 331712), (64, 310980), (71, 280320), (73, 272640), (80, 248784), (96, 207320), (120, 165856), (128, 155490), (142, 140160), (146, 136320), (160, 124392), (192, 103660), (213, 93440), (219, 90880), (240, 82928), (256, 77745), (284, 70080), (292, 68160), (320, 62196), (355, 56064), (365, 54528), (384, 51830), (426, 46720), (438, 45440), (480, 41464), (568, 35040), (584, 34080), (640, 31098), (710, 28032), (730, 27264), (768, 25915), (852, 23360), (876, 22720), (960, 20732), (1065, 18688), (1095, 18176), (1136, 17520), (1168, 17040), (1280, 15549), (1420, 14016), (1460, 13632), (1704, 11680), (1752, 11360), (1920, 10366), (2130, 9344), (2190, 9088), (2272, 8760), (2336, 8520), (2840, 7008), (2920, 6816), (3408, 5840), (3504, 5680), (3840, 5183), (4260, 4672), (4380, 4544)]