21755955

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:172

約数の個数: 64

約数和(自身を含む): 39997440

約数和(自身を除く): 18241485

約数列:

[1, 3, 5, 13, 15, 31, 39, 59, 61, 65, 93, 155, 177, 183, 195, 295, 305, 403, 465, 767, 793, 885, 915, 1209, 1829, 1891, 2015, 2301, 2379, 3599, 3835, 3965, 5487, 5673, 6045, 9145, 9455, 10797, 11505, 11895, 17995, 23777, 24583, 27435, 28365, 46787, 53985, 71331, 73749, 111569, 118885, 122915, 140361, 233935, 334707, 356655, 368745, 557845, 701805, 1450397, 1673535, 4351191, 7251985, 21755955]

約数ペア:

[(1, 21755955), (3, 7251985), (5, 4351191), (13, 1673535), (15, 1450397), (31, 701805), (39, 557845), (59, 368745), (61, 356655), (65, 334707), (93, 233935), (155, 140361), (177, 122915), (183, 118885), (195, 111569), (295, 73749), (305, 71331), (403, 53985), (465, 46787), (767, 28365), (793, 27435), (885, 24583), (915, 23777), (1209, 17995), (1829, 11895), (1891, 11505), (2015, 10797), (2301, 9455), (2379, 9145), (3599, 6045), (3835, 5673), (3965, 5487)]