19698950

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{179}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 18870010

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 71, 142, 155, 179, 310, 355, 358, 710, 775, 895, 1550, 1775, 1790, 2201, 3550, 4402, 4475, 5549, 8950, 11005, 11098, 12709, 22010, 25418, 27745, 55025, 55490, 63545, 110050, 127090, 138725, 277450, 317725, 393979, 635450, 787958, 1969895, 3939790, 9849475, 19698950]

約数ペア:

[(1, 19698950), (2, 9849475), (5, 3939790), (10, 1969895), (25, 787958), (31, 635450), (50, 393979), (62, 317725), (71, 277450), (142, 138725), (155, 127090), (179, 110050), (310, 63545), (355, 55490), (358, 55025), (710, 27745), (775, 25418), (895, 22010), (1550, 12709), (1775, 11098), (1790, 11005), (2201, 8950), (3550, 5549), (4402, 4475)]