19984588

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 42057792

約数和(自身を除く): 22073204

約数列:

[1, 2, 4, 13, 17, 26, 34, 37, 47, 52, 68, 74, 94, 148, 169, 188, 221, 338, 442, 481, 611, 629, 676, 799, 884, 962, 1222, 1258, 1598, 1739, 1924, 2444, 2516, 2873, 3196, 3478, 5746, 6253, 6956, 7943, 8177, 10387, 11492, 12506, 15886, 16354, 20774, 22607, 25012, 29563, 31772, 32708, 41548, 45214, 59126, 90428, 106301, 118252, 135031, 212602, 270062, 293891, 384319, 425204, 540124, 587782, 768638, 1175564, 1537276, 4996147, 9992294, 19984588]

約数ペア:

[(1, 19984588), (2, 9992294), (4, 4996147), (13, 1537276), (17, 1175564), (26, 768638), (34, 587782), (37, 540124), (47, 425204), (52, 384319), (68, 293891), (74, 270062), (94, 212602), (148, 135031), (169, 118252), (188, 106301), (221, 90428), (338, 59126), (442, 45214), (481, 41548), (611, 32708), (629, 31772), (676, 29563), (799, 25012), (884, 22607), (962, 20774), (1222, 16354), (1258, 15886), (1598, 12506), (1739, 11492), (1924, 10387), (2444, 8177), (2516, 7943), (2873, 6956), (3196, 6253), (3478, 5746)]