19677296

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{991}}^1$

素因数の和:1089

約数の個数: 40

約数和(自身を含む): 40961664

約数和(自身を除く): 21284368

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 73, 136, 146, 272, 292, 584, 991, 1168, 1241, 1982, 2482, 3964, 4964, 7928, 9928, 15856, 16847, 19856, 33694, 67388, 72343, 134776, 144686, 269552, 289372, 578744, 1157488, 1229831, 2459662, 4919324, 9838648, 19677296]

約数ペア:

[(1, 19677296), (2, 9838648), (4, 4919324), (8, 2459662), (16, 1229831), (17, 1157488), (34, 578744), (68, 289372), (73, 269552), (136, 144686), (146, 134776), (272, 72343), (292, 67388), (584, 33694), (991, 19856), (1168, 16847), (1241, 15856), (1982, 9928), (2482, 7928), (3964, 4964)]