19978406

素因数分解:

$2^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:380

約数の個数: 32

約数和(自身を含む): 35251200

約数和(自身を除く): 15272794

約数列:

[1, 2, 7, 14, 71, 101, 142, 199, 202, 398, 497, 707, 994, 1393, 1414, 2786, 7171, 14129, 14342, 20099, 28258, 40198, 50197, 98903, 100394, 140693, 197806, 281386, 1427029, 2854058, 9989203, 19978406]

約数ペア:

[(1, 19978406), (2, 9989203), (7, 2854058), (14, 1427029), (71, 281386), (101, 197806), (142, 140693), (199, 100394), (202, 98903), (398, 50197), (497, 40198), (707, 28258), (994, 20099), (1393, 14342), (1414, 14129), (2786, 7171)]