28204280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{743}}^1$

素因数の和:840

約数の個数: 64

約数和(自身を含む): 69370560

約数和(自身を除く): 41166280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 73, 104, 130, 146, 260, 292, 365, 520, 584, 730, 743, 949, 1460, 1486, 1898, 2920, 2972, 3715, 3796, 4745, 5944, 7430, 7592, 9490, 9659, 14860, 18980, 19318, 29720, 37960, 38636, 48295, 54239, 77272, 96590, 108478, 193180, 216956, 271195, 386360, 433912, 542390, 705107, 1084780, 1410214, 2169560, 2820428, 3525535, 5640856, 7051070, 14102140, 28204280]

約数ペア:

[(1, 28204280), (2, 14102140), (4, 7051070), (5, 5640856), (8, 3525535), (10, 2820428), (13, 2169560), (20, 1410214), (26, 1084780), (40, 705107), (52, 542390), (65, 433912), (73, 386360), (104, 271195), (130, 216956), (146, 193180), (260, 108478), (292, 96590), (365, 77272), (520, 54239), (584, 48295), (730, 38636), (743, 37960), (949, 29720), (1460, 19318), (1486, 18980), (1898, 14860), (2920, 9659), (2972, 9490), (3715, 7592), (3796, 7430), (4745, 5944)]