20398240

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^2\times {\mathrm{241}}^1$

素因数の和:302

約数の個数: 72

約数和(自身を含む): 50586228

約数和(自身を除く): 30187988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 241, 368, 460, 482, 529, 736, 920, 964, 1058, 1205, 1840, 1928, 2116, 2410, 2645, 3680, 3856, 4232, 4820, 5290, 5543, 7712, 8464, 9640, 10580, 11086, 16928, 19280, 21160, 22172, 27715, 38560, 42320, 44344, 55430, 84640, 88688, 110860, 127489, 177376, 221720, 254978, 443440, 509956, 637445, 886880, 1019912, 1274890, 2039824, 2549780, 4079648, 5099560, 10199120, 20398240]

約数ペア:

[(1, 20398240), (2, 10199120), (4, 5099560), (5, 4079648), (8, 2549780), (10, 2039824), (16, 1274890), (20, 1019912), (23, 886880), (32, 637445), (40, 509956), (46, 443440), (80, 254978), (92, 221720), (115, 177376), (160, 127489), (184, 110860), (230, 88688), (241, 84640), (368, 55430), (460, 44344), (482, 42320), (529, 38560), (736, 27715), (920, 22172), (964, 21160), (1058, 19280), (1205, 16928), (1840, 11086), (1928, 10580), (2116, 9640), (2410, 8464), (2645, 7712), (3680, 5543), (3856, 5290), (4232, 4820)]