19949990

素因数分解:

$2^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:392

約数の個数: 32

約数和(自身を含む): 36789984

約数和(自身を除く): 16839994

約数列:

[1, 2, 5, 10, 97, 131, 157, 194, 262, 314, 485, 655, 785, 970, 1310, 1570, 12707, 15229, 20567, 25414, 30458, 41134, 63535, 76145, 102835, 127070, 152290, 205670, 1994999, 3989998, 9974995, 19949990]

約数ペア:

[(1, 19949990), (2, 9974995), (5, 3989998), (10, 1994999), (97, 205670), (131, 152290), (157, 127070), (194, 102835), (262, 76145), (314, 63535), (485, 41134), (655, 30458), (785, 25414), (970, 20567), (1310, 15229), (1570, 12707)]