28391840

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2909}}^1$

素因数の和:2985

約数の個数: 48

約数和(自身を含む): 68198760

約数和(自身を除く): 39806920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2440, 2909, 4880, 5818, 9760, 11636, 14545, 23272, 29090, 46544, 58180, 93088, 116360, 177449, 232720, 354898, 465440, 709796, 887245, 1419592, 1774490, 2839184, 3548980, 5678368, 7097960, 14195920, 28391840]

約数ペア:

[(1, 28391840), (2, 14195920), (4, 7097960), (5, 5678368), (8, 3548980), (10, 2839184), (16, 1774490), (20, 1419592), (32, 887245), (40, 709796), (61, 465440), (80, 354898), (122, 232720), (160, 177449), (244, 116360), (305, 93088), (488, 58180), (610, 46544), (976, 29090), (1220, 23272), (1952, 14545), (2440, 11636), (2909, 9760), (4880, 5818)]