19740955

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:247

約数の個数: 32

約数和(自身を含む): 26869248

約数和(自身を除く): 7128293

約数列:

[1, 5, 13, 31, 65, 97, 101, 155, 403, 485, 505, 1261, 1313, 2015, 3007, 3131, 6305, 6565, 9797, 15035, 15655, 39091, 40703, 48985, 127361, 195455, 203515, 303707, 636805, 1518535, 3948191, 19740955]

約数ペア:

[(1, 19740955), (5, 3948191), (13, 1518535), (31, 636805), (65, 303707), (97, 203515), (101, 195455), (155, 127361), (403, 48985), (485, 40703), (505, 39091), (1261, 15655), (1313, 15035), (2015, 9797), (3007, 6565), (3131, 6305)]