19718972

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 44241120

約数和(自身を除く): 24522148

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 71, 91, 98, 109, 142, 182, 196, 218, 284, 364, 436, 497, 637, 763, 923, 994, 1274, 1417, 1526, 1846, 1988, 2548, 2834, 3052, 3479, 3692, 5341, 5668, 6461, 6958, 7739, 9919, 10682, 12922, 13916, 15478, 19838, 21364, 25844, 30956, 39676, 45227, 54173, 69433, 90454, 100607, 108346, 138866, 180908, 201214, 216692, 277732, 379211, 402428, 704249, 758422, 1408498, 1516844, 2816996, 4929743, 9859486, 19718972]

約数ペア:

[(1, 19718972), (2, 9859486), (4, 4929743), (7, 2816996), (13, 1516844), (14, 1408498), (26, 758422), (28, 704249), (49, 402428), (52, 379211), (71, 277732), (91, 216692), (98, 201214), (109, 180908), (142, 138866), (182, 108346), (196, 100607), (218, 90454), (284, 69433), (364, 54173), (436, 45227), (497, 39676), (637, 30956), (763, 25844), (923, 21364), (994, 19838), (1274, 15478), (1417, 13916), (1526, 12922), (1846, 10682), (1988, 9919), (2548, 7739), (2834, 6958), (3052, 6461), (3479, 5668), (3692, 5341)]