20408892

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:651

約数の個数: 72

約数和(自身を含む): 56402640

約数和(自身を除く): 35993748

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 61, 84, 98, 122, 147, 183, 196, 244, 294, 366, 427, 569, 588, 732, 854, 1138, 1281, 1707, 1708, 2276, 2562, 2989, 3414, 3983, 5124, 5978, 6828, 7966, 8967, 11949, 11956, 15932, 17934, 23898, 27881, 34709, 35868, 47796, 55762, 69418, 83643, 104127, 111524, 138836, 167286, 208254, 242963, 334572, 416508, 485926, 728889, 971852, 1457778, 1700741, 2915556, 3401482, 5102223, 6802964, 10204446, 20408892]

約数ペア:

[(1, 20408892), (2, 10204446), (3, 6802964), (4, 5102223), (6, 3401482), (7, 2915556), (12, 1700741), (14, 1457778), (21, 971852), (28, 728889), (42, 485926), (49, 416508), (61, 334572), (84, 242963), (98, 208254), (122, 167286), (147, 138836), (183, 111524), (196, 104127), (244, 83643), (294, 69418), (366, 55762), (427, 47796), (569, 35868), (588, 34709), (732, 27881), (854, 23898), (1138, 17934), (1281, 15932), (1707, 11956), (1708, 11949), (2276, 8967), (2562, 7966), (2989, 6828), (3414, 5978), (3983, 5124)]