20494920100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^2\times {\mathrm{121921}}^1$

素因数の和:122017

約数の個数: 54

約数和(自身を含む): 45585538502

約数和(自身を除く): 25090618402

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 820, 1025, 1681, 2050, 3362, 4100, 6724, 8405, 16810, 33620, 42025, 84050, 121921, 168100, 243842, 487684, 609605, 1219210, 2438420, 3048025, 4998761, 6096050, 9997522, 12192100, 19995044, 24993805, 49987610, 99975220, 124969025, 204949201, 249938050, 409898402, 499876100, 819796804, 1024746005, 2049492010, 4098984020, 5123730025, 10247460050, 20494920100]

約数ペア:

[(1, 20494920100), (2, 10247460050), (4, 5123730025), (5, 4098984020), (10, 2049492010), (20, 1024746005), (25, 819796804), (41, 499876100), (50, 409898402), (82, 249938050), (100, 204949201), (164, 124969025), (205, 99975220), (410, 49987610), (820, 24993805), (1025, 19995044), (1681, 12192100), (2050, 9997522), (3362, 6096050), (4100, 4998761), (6724, 3048025), (8405, 2438420), (16810, 1219210), (33620, 609605), (42025, 487684), (84050, 243842), (121921, 168100)]