12638420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 28358400

約数和(自身を除く): 15719980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 421, 790, 842, 1501, 1580, 1684, 2105, 3002, 4210, 6004, 7505, 7999, 8420, 15010, 15998, 30020, 31996, 33259, 39995, 66518, 79990, 133036, 159980, 166295, 332590, 631921, 665180, 1263842, 2527684, 3159605, 6319210, 12638420]

約数ペア:

[(1, 12638420), (2, 6319210), (4, 3159605), (5, 2527684), (10, 1263842), (19, 665180), (20, 631921), (38, 332590), (76, 166295), (79, 159980), (95, 133036), (158, 79990), (190, 66518), (316, 39995), (380, 33259), (395, 31996), (421, 30020), (790, 15998), (842, 15010), (1501, 8420), (1580, 7999), (1684, 7505), (2105, 6004), (3002, 4210)]