20913440

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5683}}^1$

素因数の和:5721

約数の個数: 48

約数和(自身を含む): 51565248

約数和(自身を除く): 30651808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 368, 460, 736, 920, 1840, 3680, 5683, 11366, 22732, 28415, 45464, 56830, 90928, 113660, 130709, 181856, 227320, 261418, 454640, 522836, 653545, 909280, 1045672, 1307090, 2091344, 2614180, 4182688, 5228360, 10456720, 20913440]

約数ペア:

[(1, 20913440), (2, 10456720), (4, 5228360), (5, 4182688), (8, 2614180), (10, 2091344), (16, 1307090), (20, 1045672), (23, 909280), (32, 653545), (40, 522836), (46, 454640), (80, 261418), (92, 227320), (115, 181856), (160, 130709), (184, 113660), (230, 90928), (368, 56830), (460, 45464), (736, 28415), (920, 22732), (1840, 11366), (3680, 5683)]