21695440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{907}}^1$

素因数の和:956

約数の個数: 80

約数和(自身を含む): 56746368

約数和(自身を除く): 35050928

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 907, 920, 1040, 1196, 1495, 1814, 1840, 2392, 2990, 3628, 4535, 4784, 5980, 7256, 9070, 11791, 11960, 14512, 18140, 20861, 23582, 23920, 36280, 41722, 47164, 58955, 72560, 83444, 94328, 104305, 117910, 166888, 188656, 208610, 235820, 271193, 333776, 417220, 471640, 542386, 834440, 943280, 1084772, 1355965, 1668880, 2169544, 2711930, 4339088, 5423860, 10847720, 21695440]

約数ペア:

[(1, 21695440), (2, 10847720), (4, 5423860), (5, 4339088), (8, 2711930), (10, 2169544), (13, 1668880), (16, 1355965), (20, 1084772), (23, 943280), (26, 834440), (40, 542386), (46, 471640), (52, 417220), (65, 333776), (80, 271193), (92, 235820), (104, 208610), (115, 188656), (130, 166888), (184, 117910), (208, 104305), (230, 94328), (260, 83444), (299, 72560), (368, 58955), (460, 47164), (520, 41722), (598, 36280), (907, 23920), (920, 23582), (1040, 20861), (1196, 18140), (1495, 14512), (1814, 11960), (1840, 11791), (2392, 9070), (2990, 7256), (3628, 5980), (4535, 4784)]