21500440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 52617600

約数和(自身を除く): 31117160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 173, 239, 260, 346, 478, 520, 692, 865, 956, 1195, 1384, 1730, 1912, 2249, 2390, 3107, 3460, 4498, 4780, 6214, 6920, 8996, 9560, 11245, 12428, 15535, 17992, 22490, 24856, 31070, 41347, 44980, 62140, 82694, 89960, 124280, 165388, 206735, 330776, 413470, 537511, 826940, 1075022, 1653880, 2150044, 2687555, 4300088, 5375110, 10750220, 21500440]

約数ペア:

[(1, 21500440), (2, 10750220), (4, 5375110), (5, 4300088), (8, 2687555), (10, 2150044), (13, 1653880), (20, 1075022), (26, 826940), (40, 537511), (52, 413470), (65, 330776), (104, 206735), (130, 165388), (173, 124280), (239, 89960), (260, 82694), (346, 62140), (478, 44980), (520, 41347), (692, 31070), (865, 24856), (956, 22490), (1195, 17992), (1384, 15535), (1730, 12428), (1912, 11245), (2249, 9560), (2390, 8996), (3107, 6920), (3460, 6214), (4498, 4780)]