818309840

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{131}}^1\times {\mathrm{691}}^1$

素因数の和:948

約数の個数: 80

約数和(自身を含む): 1936858176

約数和(自身を除く): 1118548336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 131, 226, 262, 452, 524, 565, 655, 691, 904, 1048, 1130, 1310, 1382, 1808, 2096, 2260, 2620, 2764, 3455, 4520, 5240, 5528, 6910, 9040, 10480, 11056, 13820, 14803, 27640, 29606, 55280, 59212, 74015, 78083, 90521, 118424, 148030, 156166, 181042, 236848, 296060, 312332, 362084, 390415, 452605, 592120, 624664, 724168, 780830, 905210, 1184240, 1249328, 1448336, 1561660, 1810420, 3123320, 3620840, 6246640, 7241680, 10228873, 20457746, 40915492, 51144365, 81830984, 102288730, 163661968, 204577460, 409154920, 818309840]

約数ペア:

[(1, 818309840), (2, 409154920), (4, 204577460), (5, 163661968), (8, 102288730), (10, 81830984), (16, 51144365), (20, 40915492), (40, 20457746), (80, 10228873), (113, 7241680), (131, 6246640), (226, 3620840), (262, 3123320), (452, 1810420), (524, 1561660), (565, 1448336), (655, 1249328), (691, 1184240), (904, 905210), (1048, 780830), (1130, 724168), (1310, 624664), (1382, 592120), (1808, 452605), (2096, 390415), (2260, 362084), (2620, 312332), (2764, 296060), (3455, 236848), (4520, 181042), (5240, 156166), (5528, 148030), (6910, 118424), (9040, 90521), (10480, 78083), (11056, 74015), (13820, 59212), (14803, 55280), (27640, 29606)]