21158820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{353}}^1$

素因数の和:411

約数の個数: 120

約数和(自身を含む): 68363064

約数和(自身を除く): 47204244

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 37, 45, 54, 60, 74, 81, 90, 108, 111, 135, 148, 162, 180, 185, 222, 270, 324, 333, 353, 370, 405, 444, 540, 555, 666, 706, 740, 810, 999, 1059, 1110, 1332, 1412, 1620, 1665, 1765, 1998, 2118, 2220, 2997, 3177, 3330, 3530, 3996, 4236, 4995, 5295, 5994, 6354, 6660, 7060, 9531, 9990, 10590, 11988, 12708, 13061, 14985, 15885, 19062, 19980, 21180, 26122, 28593, 29970, 31770, 38124, 39183, 47655, 52244, 57186, 59940, 63540, 65305, 78366, 95310, 114372, 117549, 130610, 142965, 156732, 190620, 195915, 235098, 261220, 285930, 352647, 391830, 470196, 571860, 587745, 705294, 783660, 1057941, 1175490, 1410588, 1763235, 2115882, 2350980, 3526470, 4231764, 5289705, 7052940, 10579410, 21158820]

約数ペア:

[(1, 21158820), (2, 10579410), (3, 7052940), (4, 5289705), (5, 4231764), (6, 3526470), (9, 2350980), (10, 2115882), (12, 1763235), (15, 1410588), (18, 1175490), (20, 1057941), (27, 783660), (30, 705294), (36, 587745), (37, 571860), (45, 470196), (54, 391830), (60, 352647), (74, 285930), (81, 261220), (90, 235098), (108, 195915), (111, 190620), (135, 156732), (148, 142965), (162, 130610), (180, 117549), (185, 114372), (222, 95310), (270, 78366), (324, 65305), (333, 63540), (353, 59940), (370, 57186), (405, 52244), (444, 47655), (540, 39183), (555, 38124), (666, 31770), (706, 29970), (740, 28593), (810, 26122), (999, 21180), (1059, 19980), (1110, 19062), (1332, 15885), (1412, 14985), (1620, 13061), (1665, 12708), (1765, 11988), (1998, 10590), (2118, 9990), (2220, 9531), (2997, 7060), (3177, 6660), (3330, 6354), (3530, 5994), (3996, 5295), (4236, 4995)]