81980820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23971}}^1$

素因数の和:24005

約数の個数: 72

約数和(自身を含む): 261774240

約数和(自身を除く): 179793420

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, 570, 684, 855, 1140, 1710, 3420, 23971, 47942, 71913, 95884, 119855, 143826, 215739, 239710, 287652, 359565, 431478, 455449, 479420, 719130, 862956, 910898, 1078695, 1366347, 1438260, 1821796, 2157390, 2277245, 2732694, 4099041, 4314780, 4554490, 5465388, 6831735, 8198082, 9108980, 13663470, 16396164, 20495205, 27326940, 40990410, 81980820]

約数ペア:

[(1, 81980820), (2, 40990410), (3, 27326940), (4, 20495205), (5, 16396164), (6, 13663470), (9, 9108980), (10, 8198082), (12, 6831735), (15, 5465388), (18, 4554490), (19, 4314780), (20, 4099041), (30, 2732694), (36, 2277245), (38, 2157390), (45, 1821796), (57, 1438260), (60, 1366347), (76, 1078695), (90, 910898), (95, 862956), (114, 719130), (171, 479420), (180, 455449), (190, 431478), (228, 359565), (285, 287652), (342, 239710), (380, 215739), (570, 143826), (684, 119855), (855, 95884), (1140, 71913), (1710, 47942), (3420, 23971)]