205161720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{421}}^1$

素因数の和:597

約数の個数: 128

約数和(自身を含む): 641710080

約数和(自身を除く): 436548360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 31, 40, 60, 62, 93, 120, 124, 131, 155, 186, 248, 262, 310, 372, 393, 421, 465, 524, 620, 655, 744, 786, 842, 930, 1048, 1240, 1263, 1310, 1572, 1684, 1860, 1965, 2105, 2526, 2620, 3144, 3368, 3720, 3930, 4061, 4210, 5052, 5240, 6315, 7860, 8122, 8420, 10104, 12183, 12630, 13051, 15720, 16244, 16840, 20305, 24366, 25260, 26102, 32488, 39153, 40610, 48732, 50520, 52204, 55151, 60915, 65255, 78306, 81220, 97464, 104408, 110302, 121830, 130510, 156612, 162440, 165453, 195765, 220604, 243660, 261020, 275755, 313224, 330906, 391530, 441208, 487320, 522040, 551510, 661812, 783060, 827265, 1103020, 1323624, 1566120, 1654530, 1709681, 2206040, 3309060, 3419362, 5129043, 6618120, 6838724, 8548405, 10258086, 13677448, 17096810, 20516172, 25645215, 34193620, 41032344, 51290430, 68387240, 102580860, 205161720]

約数ペア:

[(1, 205161720), (2, 102580860), (3, 68387240), (4, 51290430), (5, 41032344), (6, 34193620), (8, 25645215), (10, 20516172), (12, 17096810), (15, 13677448), (20, 10258086), (24, 8548405), (30, 6838724), (31, 6618120), (40, 5129043), (60, 3419362), (62, 3309060), (93, 2206040), (120, 1709681), (124, 1654530), (131, 1566120), (155, 1323624), (186, 1103020), (248, 827265), (262, 783060), (310, 661812), (372, 551510), (393, 522040), (421, 487320), (465, 441208), (524, 391530), (620, 330906), (655, 313224), (744, 275755), (786, 261020), (842, 243660), (930, 220604), (1048, 195765), (1240, 165453), (1263, 162440), (1310, 156612), (1572, 130510), (1684, 121830), (1860, 110302), (1965, 104408), (2105, 97464), (2526, 81220), (2620, 78306), (3144, 65255), (3368, 60915), (3720, 55151), (3930, 52204), (4061, 50520), (4210, 48732), (5052, 40610), (5240, 39153), (6315, 32488), (7860, 26102), (8122, 25260), (8420, 24366), (10104, 20305), (12183, 16840), (12630, 16244), (13051, 15720)]