21178440

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{661}}^1$

素因数の和:767

約数の個数: 96

約数和(自身を含む): 69708600

約数和(自身を除く): 48530160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 89, 90, 120, 178, 180, 267, 356, 360, 445, 534, 661, 712, 801, 890, 1068, 1322, 1335, 1602, 1780, 1983, 2136, 2644, 2670, 3204, 3305, 3560, 3966, 4005, 5288, 5340, 5949, 6408, 6610, 7932, 8010, 9915, 10680, 11898, 13220, 15864, 16020, 19830, 23796, 26440, 29745, 32040, 39660, 47592, 58829, 59490, 79320, 117658, 118980, 176487, 235316, 237960, 294145, 352974, 470632, 529461, 588290, 705948, 882435, 1058922, 1176580, 1411896, 1764870, 2117844, 2353160, 2647305, 3529740, 4235688, 5294610, 7059480, 10589220, 21178440]

約数ペア:

[(1, 21178440), (2, 10589220), (3, 7059480), (4, 5294610), (5, 4235688), (6, 3529740), (8, 2647305), (9, 2353160), (10, 2117844), (12, 1764870), (15, 1411896), (18, 1176580), (20, 1058922), (24, 882435), (30, 705948), (36, 588290), (40, 529461), (45, 470632), (60, 352974), (72, 294145), (89, 237960), (90, 235316), (120, 176487), (178, 118980), (180, 117658), (267, 79320), (356, 59490), (360, 58829), (445, 47592), (534, 39660), (661, 32040), (712, 29745), (801, 26440), (890, 23796), (1068, 19830), (1322, 16020), (1335, 15864), (1602, 13220), (1780, 11898), (1983, 10680), (2136, 9915), (2644, 8010), (2670, 7932), (3204, 6610), (3305, 6408), (3560, 5949), (3966, 5340), (4005, 5288)]