20281320

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{211}}^1$

素因数の和:320

約数の個数: 128

約数和(自身を含む): 68688000

約数和(自身を除く): 48406680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 89, 90, 108, 120, 135, 178, 180, 211, 216, 267, 270, 356, 360, 422, 445, 534, 540, 633, 712, 801, 844, 890, 1055, 1068, 1080, 1266, 1335, 1602, 1688, 1780, 1899, 2110, 2136, 2403, 2532, 2670, 3165, 3204, 3560, 3798, 4005, 4220, 4806, 5064, 5340, 5697, 6330, 6408, 7596, 8010, 8440, 9495, 9612, 10680, 11394, 12015, 12660, 15192, 16020, 18779, 18990, 19224, 22788, 24030, 25320, 28485, 32040, 37558, 37980, 45576, 48060, 56337, 56970, 75116, 75960, 93895, 96120, 112674, 113940, 150232, 169011, 187790, 225348, 227880, 281685, 338022, 375580, 450696, 507033, 563370, 676044, 751160, 845055, 1014066, 1126740, 1352088, 1690110, 2028132, 2253480, 2535165, 3380220, 4056264, 5070330, 6760440, 10140660, 20281320]

約数ペア:

[(1, 20281320), (2, 10140660), (3, 6760440), (4, 5070330), (5, 4056264), (6, 3380220), (8, 2535165), (9, 2253480), (10, 2028132), (12, 1690110), (15, 1352088), (18, 1126740), (20, 1014066), (24, 845055), (27, 751160), (30, 676044), (36, 563370), (40, 507033), (45, 450696), (54, 375580), (60, 338022), (72, 281685), (89, 227880), (90, 225348), (108, 187790), (120, 169011), (135, 150232), (178, 113940), (180, 112674), (211, 96120), (216, 93895), (267, 75960), (270, 75116), (356, 56970), (360, 56337), (422, 48060), (445, 45576), (534, 37980), (540, 37558), (633, 32040), (712, 28485), (801, 25320), (844, 24030), (890, 22788), (1055, 19224), (1068, 18990), (1080, 18779), (1266, 16020), (1335, 15192), (1602, 12660), (1688, 12015), (1780, 11394), (1899, 10680), (2110, 9612), (2136, 9495), (2403, 8440), (2532, 8010), (2670, 7596), (3165, 6408), (3204, 6330), (3560, 5697), (3798, 5340), (4005, 5064), (4220, 4806)]