21178654

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{773}}^1$

素因数の和:904

約数の個数: 32

約数和(自身を含む): 38638080

約数和(自身を除く): 17459426

約数列:

[1, 2, 7, 14, 19, 38, 103, 133, 206, 266, 721, 773, 1442, 1546, 1957, 3914, 5411, 10822, 13699, 14687, 27398, 29374, 79619, 102809, 159238, 205618, 557333, 1114666, 1512761, 3025522, 10589327, 21178654]

約数ペア:

[(1, 21178654), (2, 10589327), (7, 3025522), (14, 1512761), (19, 1114666), (38, 557333), (103, 205618), (133, 159238), (206, 102809), (266, 79619), (721, 29374), (773, 27398), (1442, 14687), (1546, 13699), (1957, 10822), (3914, 5411)]