21392865

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 41965560

約数和(自身を除く): 20572695

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 97, 117, 145, 169, 195, 261, 291, 377, 435, 485, 507, 585, 845, 873, 1131, 1261, 1305, 1455, 1521, 1885, 2535, 2813, 3393, 3783, 4365, 4901, 5655, 6305, 7605, 8439, 11349, 14065, 14703, 16393, 16965, 18915, 24505, 25317, 36569, 42195, 44109, 49179, 56745, 73515, 81965, 109707, 126585, 147537, 182845, 220545, 245895, 329121, 475397, 548535, 737685, 1426191, 1645605, 2376985, 4278573, 7130955, 21392865]

約数ペア:

[(1, 21392865), (3, 7130955), (5, 4278573), (9, 2376985), (13, 1645605), (15, 1426191), (29, 737685), (39, 548535), (45, 475397), (65, 329121), (87, 245895), (97, 220545), (117, 182845), (145, 147537), (169, 126585), (195, 109707), (261, 81965), (291, 73515), (377, 56745), (435, 49179), (485, 44109), (507, 42195), (585, 36569), (845, 25317), (873, 24505), (1131, 18915), (1261, 16965), (1305, 16393), (1455, 14703), (1521, 14065), (1885, 11349), (2535, 8439), (2813, 7605), (3393, 6305), (3783, 5655), (4365, 4901)]