20180920340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{199}}^1\times {\mathrm{3677}}^1$

素因数の和:4089

約数の個数: 96

約数和(自身を含む): 48937996800

約数和(自身を除く): 28757076460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 199, 394, 398, 788, 796, 985, 995, 1379, 1393, 1970, 1990, 2758, 2786, 3677, 3940, 3980, 5516, 5572, 6895, 6965, 7354, 13790, 13930, 14708, 18385, 25739, 27580, 27860, 36770, 39203, 51478, 73540, 78406, 102956, 128695, 156812, 196015, 257390, 274421, 392030, 514780, 548842, 724369, 731723, 784060, 1097684, 1372105, 1448738, 1463446, 2744210, 2897476, 2926892, 3621845, 3658615, 5070583, 5122061, 5488420, 7243690, 7317230, 10141166, 10244122, 14487380, 14634460, 20282332, 20488244, 25352915, 25610305, 50705830, 51220610, 101411660, 102441220, 144149431, 288298862, 576597724, 720747155, 1009046017, 1441494310, 2018092034, 2882988620, 4036184068, 5045230085, 10090460170, 20180920340]

約数ペア:

[(1, 20180920340), (2, 10090460170), (4, 5045230085), (5, 4036184068), (7, 2882988620), (10, 2018092034), (14, 1441494310), (20, 1009046017), (28, 720747155), (35, 576597724), (70, 288298862), (140, 144149431), (197, 102441220), (199, 101411660), (394, 51220610), (398, 50705830), (788, 25610305), (796, 25352915), (985, 20488244), (995, 20282332), (1379, 14634460), (1393, 14487380), (1970, 10244122), (1990, 10141166), (2758, 7317230), (2786, 7243690), (3677, 5488420), (3940, 5122061), (3980, 5070583), (5516, 3658615), (5572, 3621845), (6895, 2926892), (6965, 2897476), (7354, 2744210), (13790, 1463446), (13930, 1448738), (14708, 1372105), (18385, 1097684), (25739, 784060), (27580, 731723), (27860, 724369), (36770, 548842), (39203, 514780), (51478, 392030), (73540, 274421), (78406, 257390), (102956, 196015), (128695, 156812)]