19974695

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{431}}^1$

素因数の和:503

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7894489

約数列:

[1, 5, 13, 23, 31, 65, 115, 155, 299, 403, 431, 713, 1495, 2015, 2155, 3565, 5603, 9269, 9913, 13361, 28015, 46345, 49565, 66805, 128869, 173693, 307303, 644345, 868465, 1536515, 3994939, 19974695]

約数ペア:

[(1, 19974695), (5, 3994939), (13, 1536515), (23, 868465), (31, 644345), (65, 307303), (115, 173693), (155, 128869), (299, 66805), (403, 49565), (431, 46345), (713, 28015), (1495, 13361), (2015, 9913), (2155, 9269), (3565, 5603)]