18983139

素因数分解:

$3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:180

約数の個数: 48

約数和(自身を含む): 31381920

約数和(自身を除く): 12398781

約数列:

[1, 3, 7, 21, 29, 49, 61, 73, 87, 147, 183, 203, 219, 427, 511, 609, 1281, 1421, 1533, 1769, 2117, 2989, 3577, 4263, 4453, 5307, 6351, 8967, 10731, 12383, 13359, 14819, 31171, 37149, 44457, 86681, 93513, 103733, 129137, 218197, 260043, 311199, 387411, 654591, 903959, 2711877, 6327713, 18983139]

約数ペア:

[(1, 18983139), (3, 6327713), (7, 2711877), (21, 903959), (29, 654591), (49, 387411), (61, 311199), (73, 260043), (87, 218197), (147, 129137), (183, 103733), (203, 93513), (219, 86681), (427, 44457), (511, 37149), (609, 31171), (1281, 14819), (1421, 13359), (1533, 12383), (1769, 10731), (2117, 8967), (2989, 6351), (3577, 5307), (4263, 4453)]