31191440

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:209

約数の個数: 120

約数和(自身を含む): 86300280

約数和(自身を除く): 55108840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 73, 80, 98, 109, 112, 140, 146, 196, 218, 245, 280, 292, 365, 392, 436, 490, 511, 545, 560, 584, 730, 763, 784, 872, 980, 1022, 1090, 1168, 1460, 1526, 1744, 1960, 2044, 2180, 2555, 2920, 3052, 3577, 3815, 3920, 4088, 4360, 5110, 5341, 5840, 6104, 7154, 7630, 7957, 8176, 8720, 10220, 10682, 12208, 14308, 15260, 15914, 17885, 20440, 21364, 26705, 28616, 30520, 31828, 35770, 39785, 40880, 42728, 53410, 55699, 57232, 61040, 63656, 71540, 79570, 85456, 106820, 111398, 127312, 143080, 159140, 213640, 222796, 278495, 286160, 318280, 389893, 427280, 445592, 556990, 636560, 779786, 891184, 1113980, 1559572, 1949465, 2227960, 3119144, 3898930, 4455920, 6238288, 7797860, 15595720, 31191440]

約数ペア:

[(1, 31191440), (2, 15595720), (4, 7797860), (5, 6238288), (7, 4455920), (8, 3898930), (10, 3119144), (14, 2227960), (16, 1949465), (20, 1559572), (28, 1113980), (35, 891184), (40, 779786), (49, 636560), (56, 556990), (70, 445592), (73, 427280), (80, 389893), (98, 318280), (109, 286160), (112, 278495), (140, 222796), (146, 213640), (196, 159140), (218, 143080), (245, 127312), (280, 111398), (292, 106820), (365, 85456), (392, 79570), (436, 71540), (490, 63656), (511, 61040), (545, 57232), (560, 55699), (584, 53410), (730, 42728), (763, 40880), (784, 39785), (872, 35770), (980, 31828), (1022, 30520), (1090, 28616), (1168, 26705), (1460, 21364), (1526, 20440), (1744, 17885), (1960, 15914), (2044, 15260), (2180, 14308), (2555, 12208), (2920, 10682), (3052, 10220), (3577, 8720), (3815, 8176), (3920, 7957), (4088, 7630), (4360, 7154), (5110, 6104), (5341, 5840)]