21712440

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:229

約数の個数: 128

約数和(自身を含む): 69984000

約数和(自身を除く): 48271560

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 89, 95, 107, 114, 120, 152, 178, 190, 214, 228, 267, 285, 321, 356, 380, 428, 445, 456, 534, 535, 570, 642, 712, 760, 856, 890, 1068, 1070, 1140, 1284, 1335, 1605, 1691, 1780, 2033, 2136, 2140, 2280, 2568, 2670, 3210, 3382, 3560, 4066, 4280, 5073, 5340, 6099, 6420, 6764, 8132, 8455, 9523, 10146, 10165, 10680, 12198, 12840, 13528, 16264, 16910, 19046, 20292, 20330, 24396, 25365, 28569, 30495, 33820, 38092, 40584, 40660, 47615, 48792, 50730, 57138, 60990, 67640, 76184, 81320, 95230, 101460, 114276, 121980, 142845, 180937, 190460, 202920, 228552, 243960, 285690, 361874, 380920, 542811, 571380, 723748, 904685, 1085622, 1142760, 1447496, 1809370, 2171244, 2714055, 3618740, 4342488, 5428110, 7237480, 10856220, 21712440]

約数ペア:

[(1, 21712440), (2, 10856220), (3, 7237480), (4, 5428110), (5, 4342488), (6, 3618740), (8, 2714055), (10, 2171244), (12, 1809370), (15, 1447496), (19, 1142760), (20, 1085622), (24, 904685), (30, 723748), (38, 571380), (40, 542811), (57, 380920), (60, 361874), (76, 285690), (89, 243960), (95, 228552), (107, 202920), (114, 190460), (120, 180937), (152, 142845), (178, 121980), (190, 114276), (214, 101460), (228, 95230), (267, 81320), (285, 76184), (321, 67640), (356, 60990), (380, 57138), (428, 50730), (445, 48792), (456, 47615), (534, 40660), (535, 40584), (570, 38092), (642, 33820), (712, 30495), (760, 28569), (856, 25365), (890, 24396), (1068, 20330), (1070, 20292), (1140, 19046), (1284, 16910), (1335, 16264), (1605, 13528), (1691, 12840), (1780, 12198), (2033, 10680), (2136, 10165), (2140, 10146), (2280, 9523), (2568, 8455), (2670, 8132), (3210, 6764), (3382, 6420), (3560, 6099), (4066, 5340), (4280, 5073)]