20285980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:247

約数の個数: 96

約数和(自身を含む): 51565248

約数和(自身を除く): 31279268

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 41, 44, 52, 55, 65, 82, 110, 130, 143, 164, 173, 205, 220, 260, 286, 346, 410, 451, 533, 572, 692, 715, 820, 865, 902, 1066, 1430, 1730, 1804, 1903, 2132, 2249, 2255, 2665, 2860, 3460, 3806, 4498, 4510, 5330, 5863, 7093, 7612, 8996, 9020, 9515, 10660, 11245, 11726, 14186, 19030, 22490, 23452, 24739, 28372, 29315, 35465, 38060, 44980, 49478, 58630, 70930, 78023, 92209, 98956, 117260, 123695, 141860, 156046, 184418, 247390, 312092, 368836, 390115, 461045, 494780, 780230, 922090, 1014299, 1560460, 1844180, 2028598, 4057196, 5071495, 10142990, 20285980]

約数ペア:

[(1, 20285980), (2, 10142990), (4, 5071495), (5, 4057196), (10, 2028598), (11, 1844180), (13, 1560460), (20, 1014299), (22, 922090), (26, 780230), (41, 494780), (44, 461045), (52, 390115), (55, 368836), (65, 312092), (82, 247390), (110, 184418), (130, 156046), (143, 141860), (164, 123695), (173, 117260), (205, 98956), (220, 92209), (260, 78023), (286, 70930), (346, 58630), (410, 49478), (451, 44980), (533, 38060), (572, 35465), (692, 29315), (715, 28372), (820, 24739), (865, 23452), (902, 22490), (1066, 19030), (1430, 14186), (1730, 11726), (1804, 11245), (1903, 10660), (2132, 9515), (2249, 9020), (2255, 8996), (2665, 7612), (2860, 7093), (3460, 5863), (3806, 5330), (4498, 4510)]