19997168

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1987}}^1$

素因数の和:2049

約数の個数: 40

約数和(自身を含む): 42153552

約数和(自身を除く): 22156384

約数列:

[1, 2, 4, 8, 16, 17, 34, 37, 68, 74, 136, 148, 272, 296, 592, 629, 1258, 1987, 2516, 3974, 5032, 7948, 10064, 15896, 31792, 33779, 67558, 73519, 135116, 147038, 270232, 294076, 540464, 588152, 1176304, 1249823, 2499646, 4999292, 9998584, 19997168]

約数ペア:

[(1, 19997168), (2, 9998584), (4, 4999292), (8, 2499646), (16, 1249823), (17, 1176304), (34, 588152), (37, 540464), (68, 294076), (74, 270232), (136, 147038), (148, 135116), (272, 73519), (296, 67558), (592, 33779), (629, 31792), (1258, 15896), (1987, 10064), (2516, 7948), (3974, 5032)]