21178773

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{167}}^1$

素因数の和:255

約数の個数: 64

約数和(自身を含む): 39997440

約数和(自身を除く): 18818667

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 61, 63, 77, 99, 167, 183, 189, 231, 297, 427, 501, 549, 671, 693, 1169, 1281, 1503, 1647, 1837, 2013, 2079, 3507, 3843, 4509, 4697, 5511, 6039, 10187, 10521, 11529, 12859, 14091, 16533, 18117, 30561, 31563, 38577, 42273, 49599, 71309, 91683, 112057, 115731, 126819, 213927, 275049, 336171, 347193, 641781, 784399, 1008513, 1925343, 2353197, 3025539, 7059591, 21178773]

約数ペア:

[(1, 21178773), (3, 7059591), (7, 3025539), (9, 2353197), (11, 1925343), (21, 1008513), (27, 784399), (33, 641781), (61, 347193), (63, 336171), (77, 275049), (99, 213927), (167, 126819), (183, 115731), (189, 112057), (231, 91683), (297, 71309), (427, 49599), (501, 42273), (549, 38577), (671, 31563), (693, 30561), (1169, 18117), (1281, 16533), (1503, 14091), (1647, 12859), (1837, 11529), (2013, 10521), (2079, 10187), (3507, 6039), (3843, 5511), (4509, 4697)]