19925775

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:173

約数の個数: 72

約数和(自身を含む): 38688000

約数和(自身を除く): 18762225

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 59, 75, 79, 95, 171, 177, 225, 237, 285, 295, 395, 475, 531, 711, 855, 885, 1121, 1185, 1425, 1475, 1501, 1975, 2655, 3363, 3555, 4275, 4425, 4503, 4661, 5605, 5925, 7505, 10089, 13275, 13509, 13983, 16815, 17775, 22515, 23305, 28025, 37525, 41949, 50445, 67545, 69915, 84075, 88559, 112575, 116525, 209745, 252225, 265677, 337725, 349575, 442795, 797031, 1048725, 1328385, 2213975, 3985155, 6641925, 19925775]

約数ペア:

[(1, 19925775), (3, 6641925), (5, 3985155), (9, 2213975), (15, 1328385), (19, 1048725), (25, 797031), (45, 442795), (57, 349575), (59, 337725), (75, 265677), (79, 252225), (95, 209745), (171, 116525), (177, 112575), (225, 88559), (237, 84075), (285, 69915), (295, 67545), (395, 50445), (475, 41949), (531, 37525), (711, 28025), (855, 23305), (885, 22515), (1121, 17775), (1185, 16815), (1425, 13983), (1475, 13509), (1501, 13275), (1975, 10089), (2655, 7505), (3363, 5925), (3555, 5605), (4275, 4661), (4425, 4503)]