81183440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{311}}^1$

素因数の和:588

約数の個数: 80

約数和(自身を含む): 204736896

約数和(自身を除く): 123553456

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 251, 260, 311, 502, 520, 622, 1004, 1040, 1244, 1255, 1555, 2008, 2488, 2510, 3110, 3263, 4016, 4043, 4976, 5020, 6220, 6526, 8086, 10040, 12440, 13052, 16172, 16315, 20080, 20215, 24880, 26104, 32344, 32630, 40430, 52208, 64688, 65260, 78061, 80860, 130520, 156122, 161720, 261040, 312244, 323440, 390305, 624488, 780610, 1014793, 1248976, 1561220, 2029586, 3122440, 4059172, 5073965, 6244880, 8118344, 10147930, 16236688, 20295860, 40591720, 81183440]

約数ペア:

[(1, 81183440), (2, 40591720), (4, 20295860), (5, 16236688), (8, 10147930), (10, 8118344), (13, 6244880), (16, 5073965), (20, 4059172), (26, 3122440), (40, 2029586), (52, 1561220), (65, 1248976), (80, 1014793), (104, 780610), (130, 624488), (208, 390305), (251, 323440), (260, 312244), (311, 261040), (502, 161720), (520, 156122), (622, 130520), (1004, 80860), (1040, 78061), (1244, 65260), (1255, 64688), (1555, 52208), (2008, 40430), (2488, 32630), (2510, 32344), (3110, 26104), (3263, 24880), (4016, 20215), (4043, 20080), (4976, 16315), (5020, 16172), (6220, 13052), (6526, 12440), (8086, 10040)]