19638950

素因数分解:

$2^1\times 5^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 38193984

約数和(自身を除く): 18555034

約数列:

[1, 2, 5, 10, 25, 47, 50, 61, 94, 122, 137, 235, 274, 305, 470, 610, 685, 1175, 1370, 1525, 2350, 2867, 3050, 3425, 5734, 6439, 6850, 8357, 12878, 14335, 16714, 28670, 32195, 41785, 64390, 71675, 83570, 143350, 160975, 208925, 321950, 392779, 417850, 785558, 1963895, 3927790, 9819475, 19638950]

約数ペア:

[(1, 19638950), (2, 9819475), (5, 3927790), (10, 1963895), (25, 785558), (47, 417850), (50, 392779), (61, 321950), (94, 208925), (122, 160975), (137, 143350), (235, 83570), (274, 71675), (305, 64390), (470, 41785), (610, 32195), (685, 28670), (1175, 16714), (1370, 14335), (1525, 12878), (2350, 8357), (2867, 6850), (3050, 6439), (3425, 5734)]