31881040

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:260

約数の個数: 80

約数和(自身を含む): 77495040

約数和(自身を除く): 45614000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 61, 80, 94, 122, 139, 188, 235, 244, 278, 305, 376, 470, 488, 556, 610, 695, 752, 940, 976, 1112, 1220, 1390, 1880, 2224, 2440, 2780, 2867, 3760, 4880, 5560, 5734, 6533, 8479, 11120, 11468, 13066, 14335, 16958, 22936, 26132, 28670, 32665, 33916, 42395, 45872, 52264, 57340, 65330, 67832, 84790, 104528, 114680, 130660, 135664, 169580, 229360, 261320, 339160, 398513, 522640, 678320, 797026, 1594052, 1992565, 3188104, 3985130, 6376208, 7970260, 15940520, 31881040]

約数ペア:

[(1, 31881040), (2, 15940520), (4, 7970260), (5, 6376208), (8, 3985130), (10, 3188104), (16, 1992565), (20, 1594052), (40, 797026), (47, 678320), (61, 522640), (80, 398513), (94, 339160), (122, 261320), (139, 229360), (188, 169580), (235, 135664), (244, 130660), (278, 114680), (305, 104528), (376, 84790), (470, 67832), (488, 65330), (556, 57340), (610, 52264), (695, 45872), (752, 42395), (940, 33916), (976, 32665), (1112, 28670), (1220, 26132), (1390, 22936), (1880, 16958), (2224, 14335), (2440, 13066), (2780, 11468), (2867, 11120), (3760, 8479), (4880, 6533), (5560, 5734)]