20438820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{419}}^1$

素因数の和:705

約数の個数: 72

約数和(自身を含む): 62375040

約数和(自身を除く): 41936220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 271, 419, 542, 813, 838, 1084, 1257, 1355, 1626, 1676, 2095, 2439, 2514, 2710, 3252, 3771, 4065, 4190, 4878, 5028, 5420, 6285, 7542, 8130, 8380, 9756, 12195, 12570, 15084, 16260, 18855, 24390, 25140, 37710, 48780, 75420, 113549, 227098, 340647, 454196, 567745, 681294, 1021941, 1135490, 1362588, 1703235, 2043882, 2270980, 3406470, 4087764, 5109705, 6812940, 10219410, 20438820]

約数ペア:

[(1, 20438820), (2, 10219410), (3, 6812940), (4, 5109705), (5, 4087764), (6, 3406470), (9, 2270980), (10, 2043882), (12, 1703235), (15, 1362588), (18, 1135490), (20, 1021941), (30, 681294), (36, 567745), (45, 454196), (60, 340647), (90, 227098), (180, 113549), (271, 75420), (419, 48780), (542, 37710), (813, 25140), (838, 24390), (1084, 18855), (1257, 16260), (1355, 15084), (1626, 12570), (1676, 12195), (2095, 9756), (2439, 8380), (2514, 8130), (2710, 7542), (3252, 6285), (3771, 5420), (4065, 5028), (4190, 4878)]