19904480

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4013}}^1$

素因数の和:4059

約数の個数: 48

約数和(自身を含む): 48553344

約数和(自身を除く): 28648864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4013, 4960, 8026, 16052, 20065, 32104, 40130, 64208, 80260, 124403, 128416, 160520, 248806, 321040, 497612, 622015, 642080, 995224, 1244030, 1990448, 2488060, 3980896, 4976120, 9952240, 19904480]

約数ペア:

[(1, 19904480), (2, 9952240), (4, 4976120), (5, 3980896), (8, 2488060), (10, 1990448), (16, 1244030), (20, 995224), (31, 642080), (32, 622015), (40, 497612), (62, 321040), (80, 248806), (124, 160520), (155, 128416), (160, 124403), (248, 80260), (310, 64208), (496, 40130), (620, 32104), (992, 20065), (1240, 16052), (2480, 8026), (4013, 4960)]