21985908

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{269}}^1$

素因数の和:429

約数の個数: 72

約数和(自身を含む): 60328800

約数和(自身を除く): 38342892

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 139, 147, 196, 269, 278, 294, 417, 538, 556, 588, 807, 834, 973, 1076, 1614, 1668, 1883, 1946, 2919, 3228, 3766, 3892, 5649, 5838, 6811, 7532, 11298, 11676, 13181, 13622, 20433, 22596, 26362, 27244, 37391, 39543, 40866, 52724, 74782, 79086, 81732, 112173, 149564, 158172, 224346, 261737, 448692, 523474, 785211, 1046948, 1570422, 1832159, 3140844, 3664318, 5496477, 7328636, 10992954, 21985908]

約数ペア:

[(1, 21985908), (2, 10992954), (3, 7328636), (4, 5496477), (6, 3664318), (7, 3140844), (12, 1832159), (14, 1570422), (21, 1046948), (28, 785211), (42, 523474), (49, 448692), (84, 261737), (98, 224346), (139, 158172), (147, 149564), (196, 112173), (269, 81732), (278, 79086), (294, 74782), (417, 52724), (538, 40866), (556, 39543), (588, 37391), (807, 27244), (834, 26362), (973, 22596), (1076, 20433), (1614, 13622), (1668, 13181), (1883, 11676), (1946, 11298), (2919, 7532), (3228, 6811), (3766, 5838), (3892, 5649)]