643408020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1\times {\mathrm{449}}^1$

素因数の和:902

約数の個数: 144

約数和(自身を含む): 2063880000

約数和(自身を除く): 1420471980

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 76, 90, 95, 114, 171, 180, 190, 228, 285, 342, 380, 419, 449, 570, 684, 838, 855, 898, 1140, 1257, 1347, 1676, 1710, 1796, 2095, 2245, 2514, 2694, 3420, 3771, 4041, 4190, 4490, 5028, 5388, 6285, 6735, 7542, 7961, 8082, 8380, 8531, 8980, 12570, 13470, 15084, 15922, 16164, 17062, 18855, 20205, 23883, 25140, 25593, 26940, 31844, 34124, 37710, 39805, 40410, 42655, 47766, 51186, 71649, 75420, 76779, 79610, 80820, 85310, 95532, 102372, 119415, 127965, 143298, 153558, 159220, 170620, 188131, 238830, 255930, 286596, 307116, 358245, 376262, 383895, 477660, 511860, 564393, 716490, 752524, 767790, 940655, 1128786, 1432980, 1535580, 1693179, 1881310, 2257572, 2821965, 3386358, 3574489, 3762620, 5643930, 6772716, 7148978, 8465895, 10723467, 11287860, 14297956, 16931790, 17872445, 21446934, 32170401, 33863580, 35744890, 42893868, 53617335, 64340802, 71489780, 107234670, 128681604, 160852005, 214469340, 321704010, 643408020]

約数ペア:

[(1, 643408020), (2, 321704010), (3, 214469340), (4, 160852005), (5, 128681604), (6, 107234670), (9, 71489780), (10, 64340802), (12, 53617335), (15, 42893868), (18, 35744890), (19, 33863580), (20, 32170401), (30, 21446934), (36, 17872445), (38, 16931790), (45, 14297956), (57, 11287860), (60, 10723467), (76, 8465895), (90, 7148978), (95, 6772716), (114, 5643930), (171, 3762620), (180, 3574489), (190, 3386358), (228, 2821965), (285, 2257572), (342, 1881310), (380, 1693179), (419, 1535580), (449, 1432980), (570, 1128786), (684, 940655), (838, 767790), (855, 752524), (898, 716490), (1140, 564393), (1257, 511860), (1347, 477660), (1676, 383895), (1710, 376262), (1796, 358245), (2095, 307116), (2245, 286596), (2514, 255930), (2694, 238830), (3420, 188131), (3771, 170620), (4041, 159220), (4190, 153558), (4490, 143298), (5028, 127965), (5388, 119415), (6285, 102372), (6735, 95532), (7542, 85310), (7961, 80820), (8082, 79610), (8380, 76779), (8531, 75420), (8980, 71649), (12570, 51186), (13470, 47766), (15084, 42655), (15922, 40410), (16164, 39805), (17062, 37710), (18855, 34124), (20205, 31844), (23883, 26940), (25140, 25593)]