28021760

素因数分解:

$2^{10}\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1$

素因数の和:459

約数の個数: 88

約数和(自身を含む): 72562056

約数和(自身を除く): 44540296

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 421, 512, 520, 640, 832, 842, 1024, 1040, 1280, 1664, 1684, 2080, 2105, 2560, 3328, 3368, 4160, 4210, 5120, 5473, 6656, 6736, 8320, 8420, 10946, 13312, 13472, 16640, 16840, 21892, 26944, 27365, 33280, 33680, 43784, 53888, 54730, 66560, 67360, 87568, 107776, 109460, 134720, 175136, 215552, 218920, 269440, 350272, 431104, 437840, 538880, 700544, 875680, 1077760, 1401088, 1751360, 2155520, 2802176, 3502720, 5604352, 7005440, 14010880, 28021760]

約数ペア:

[(1, 28021760), (2, 14010880), (4, 7005440), (5, 5604352), (8, 3502720), (10, 2802176), (13, 2155520), (16, 1751360), (20, 1401088), (26, 1077760), (32, 875680), (40, 700544), (52, 538880), (64, 437840), (65, 431104), (80, 350272), (104, 269440), (128, 218920), (130, 215552), (160, 175136), (208, 134720), (256, 109460), (260, 107776), (320, 87568), (416, 67360), (421, 66560), (512, 54730), (520, 53888), (640, 43784), (832, 33680), (842, 33280), (1024, 27365), (1040, 26944), (1280, 21892), (1664, 16840), (1684, 16640), (2080, 13472), (2105, 13312), (2560, 10946), (3328, 8420), (3368, 8320), (4160, 6736), (4210, 6656), (5120, 5473)]