21979980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{653}}^1$

素因数の和:696

約数の個数: 144

約数和(自身を含む): 77130144

約数和(自身を除く): 55150164

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 17, 18, 20, 22, 30, 33, 34, 36, 44, 45, 51, 55, 60, 66, 68, 85, 90, 99, 102, 110, 132, 153, 165, 170, 180, 187, 198, 204, 220, 255, 306, 330, 340, 374, 396, 495, 510, 561, 612, 653, 660, 748, 765, 935, 990, 1020, 1122, 1306, 1530, 1683, 1870, 1959, 1980, 2244, 2612, 2805, 3060, 3265, 3366, 3740, 3918, 5610, 5877, 6530, 6732, 7183, 7836, 8415, 9795, 11101, 11220, 11754, 13060, 14366, 16830, 19590, 21549, 22202, 23508, 28732, 29385, 33303, 33660, 35915, 39180, 43098, 44404, 55505, 58770, 64647, 66606, 71830, 86196, 99909, 107745, 111010, 117540, 122111, 129294, 133212, 143660, 166515, 199818, 215490, 222020, 244222, 258588, 323235, 333030, 366333, 399636, 430980, 488444, 499545, 610555, 646470, 666060, 732666, 999090, 1098999, 1221110, 1292940, 1465332, 1831665, 1998180, 2197998, 2442220, 3663330, 4395996, 5494995, 7326660, 10989990, 21979980]

約数ペア:

[(1, 21979980), (2, 10989990), (3, 7326660), (4, 5494995), (5, 4395996), (6, 3663330), (9, 2442220), (10, 2197998), (11, 1998180), (12, 1831665), (15, 1465332), (17, 1292940), (18, 1221110), (20, 1098999), (22, 999090), (30, 732666), (33, 666060), (34, 646470), (36, 610555), (44, 499545), (45, 488444), (51, 430980), (55, 399636), (60, 366333), (66, 333030), (68, 323235), (85, 258588), (90, 244222), (99, 222020), (102, 215490), (110, 199818), (132, 166515), (153, 143660), (165, 133212), (170, 129294), (180, 122111), (187, 117540), (198, 111010), (204, 107745), (220, 99909), (255, 86196), (306, 71830), (330, 66606), (340, 64647), (374, 58770), (396, 55505), (495, 44404), (510, 43098), (561, 39180), (612, 35915), (653, 33660), (660, 33303), (748, 29385), (765, 28732), (935, 23508), (990, 22202), (1020, 21549), (1122, 19590), (1306, 16830), (1530, 14366), (1683, 13060), (1870, 11754), (1959, 11220), (1980, 11101), (2244, 9795), (2612, 8415), (2805, 7836), (3060, 7183), (3265, 6732), (3366, 6530), (3740, 5877), (3918, 5610)]