21145860

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1$

素因数の和:272

約数の個数: 144

約数和(自身を含む): 70324800

約数和(自身を除く): 49178940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 27, 30, 36, 38, 45, 54, 57, 60, 76, 81, 90, 95, 108, 114, 135, 162, 171, 180, 190, 228, 229, 243, 270, 285, 324, 342, 380, 405, 458, 486, 513, 540, 570, 684, 687, 810, 855, 916, 972, 1026, 1140, 1145, 1215, 1374, 1539, 1620, 1710, 2052, 2061, 2290, 2430, 2565, 2748, 3078, 3420, 3435, 4122, 4351, 4580, 4617, 4860, 5130, 6156, 6183, 6870, 7695, 8244, 8702, 9234, 10260, 10305, 12366, 13053, 13740, 15390, 17404, 18468, 18549, 20610, 21755, 23085, 24732, 26106, 30780, 30915, 37098, 39159, 41220, 43510, 46170, 52212, 55647, 61830, 65265, 74196, 78318, 87020, 92340, 92745, 111294, 117477, 123660, 130530, 156636, 185490, 195795, 222588, 234954, 261060, 278235, 352431, 370980, 391590, 469908, 556470, 587385, 704862, 783180, 1057293, 1112940, 1174770, 1409724, 1762155, 2114586, 2349540, 3524310, 4229172, 5286465, 7048620, 10572930, 21145860]

約数ペア:

[(1, 21145860), (2, 10572930), (3, 7048620), (4, 5286465), (5, 4229172), (6, 3524310), (9, 2349540), (10, 2114586), (12, 1762155), (15, 1409724), (18, 1174770), (19, 1112940), (20, 1057293), (27, 783180), (30, 704862), (36, 587385), (38, 556470), (45, 469908), (54, 391590), (57, 370980), (60, 352431), (76, 278235), (81, 261060), (90, 234954), (95, 222588), (108, 195795), (114, 185490), (135, 156636), (162, 130530), (171, 123660), (180, 117477), (190, 111294), (228, 92745), (229, 92340), (243, 87020), (270, 78318), (285, 74196), (324, 65265), (342, 61830), (380, 55647), (405, 52212), (458, 46170), (486, 43510), (513, 41220), (540, 39159), (570, 37098), (684, 30915), (687, 30780), (810, 26106), (855, 24732), (916, 23085), (972, 21755), (1026, 20610), (1140, 18549), (1145, 18468), (1215, 17404), (1374, 15390), (1539, 13740), (1620, 13053), (1710, 12366), (2052, 10305), (2061, 10260), (2290, 9234), (2430, 8702), (2565, 8244), (2748, 7695), (3078, 6870), (3420, 6183), (3435, 6156), (4122, 5130), (4351, 4860), (4580, 4617)]