20218428

素因数分解:

$2^2\times 3^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{353}}^1$

素因数の和:443

約数の個数: 72

約数和(自身を含む): 53861808

約数和(自身を除く): 33643380

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 37, 43, 74, 86, 111, 129, 148, 172, 222, 258, 333, 353, 387, 444, 516, 666, 706, 774, 1059, 1332, 1412, 1548, 1591, 2118, 3177, 3182, 4236, 4773, 6354, 6364, 9546, 12708, 13061, 14319, 15179, 19092, 26122, 28638, 30358, 39183, 45537, 52244, 57276, 60716, 78366, 91074, 117549, 136611, 156732, 182148, 235098, 273222, 470196, 546444, 561623, 1123246, 1684869, 2246492, 3369738, 5054607, 6739476, 10109214, 20218428]

約数ペア:

[(1, 20218428), (2, 10109214), (3, 6739476), (4, 5054607), (6, 3369738), (9, 2246492), (12, 1684869), (18, 1123246), (36, 561623), (37, 546444), (43, 470196), (74, 273222), (86, 235098), (111, 182148), (129, 156732), (148, 136611), (172, 117549), (222, 91074), (258, 78366), (333, 60716), (353, 57276), (387, 52244), (444, 45537), (516, 39183), (666, 30358), (706, 28638), (774, 26122), (1059, 19092), (1332, 15179), (1412, 14319), (1548, 13061), (1591, 12708), (2118, 9546), (3177, 6364), (3182, 6354), (4236, 4773)]