19977225

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{313}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 35509632

約数和(自身を除く): 15532407

約数列:

[1, 3, 5, 15, 23, 25, 37, 69, 75, 111, 115, 185, 313, 345, 555, 575, 851, 925, 939, 1565, 1725, 2553, 2775, 4255, 4695, 7199, 7825, 11581, 12765, 21275, 21597, 23475, 34743, 35995, 57905, 63825, 107985, 173715, 179975, 266363, 289525, 539925, 799089, 868575, 1331815, 3995445, 6659075, 19977225]

約数ペア:

[(1, 19977225), (3, 6659075), (5, 3995445), (15, 1331815), (23, 868575), (25, 799089), (37, 539925), (69, 289525), (75, 266363), (111, 179975), (115, 173715), (185, 107985), (313, 63825), (345, 57905), (555, 35995), (575, 34743), (851, 23475), (925, 21597), (939, 21275), (1565, 12765), (1725, 11581), (2553, 7825), (2775, 7199), (4255, 4695)]