15940520

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:258

約数の個数: 64

約数和(自身を含む): 37497600

約数和(自身を除く): 21557080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 139, 188, 235, 244, 278, 305, 376, 470, 488, 556, 610, 695, 940, 1112, 1220, 1390, 1880, 2440, 2780, 2867, 5560, 5734, 6533, 8479, 11468, 13066, 14335, 16958, 22936, 26132, 28670, 32665, 33916, 42395, 52264, 57340, 65330, 67832, 84790, 114680, 130660, 169580, 261320, 339160, 398513, 797026, 1594052, 1992565, 3188104, 3985130, 7970260, 15940520]

約数ペア:

[(1, 15940520), (2, 7970260), (4, 3985130), (5, 3188104), (8, 1992565), (10, 1594052), (20, 797026), (40, 398513), (47, 339160), (61, 261320), (94, 169580), (122, 130660), (139, 114680), (188, 84790), (235, 67832), (244, 65330), (278, 57340), (305, 52264), (376, 42395), (470, 33916), (488, 32665), (556, 28670), (610, 26132), (695, 22936), (940, 16958), (1112, 14335), (1220, 13066), (1390, 11468), (1880, 8479), (2440, 6533), (2780, 5734), (2867, 5560)]