20820100

素因数分解:

$2^2\times 5^2\times 7^3\times {\mathrm{607}}^1$

素因数の和:642

約数の個数: 72

約数和(自身を含む): 52774400

約数和(自身を除く): 31954300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 343, 350, 490, 607, 686, 700, 980, 1214, 1225, 1372, 1715, 2428, 2450, 3035, 3430, 4249, 4900, 6070, 6860, 8498, 8575, 12140, 15175, 16996, 17150, 21245, 29743, 30350, 34300, 42490, 59486, 60700, 84980, 106225, 118972, 148715, 208201, 212450, 297430, 416402, 424900, 594860, 743575, 832804, 1041005, 1487150, 2082010, 2974300, 4164020, 5205025, 10410050, 20820100]

約数ペア:

[(1, 20820100), (2, 10410050), (4, 5205025), (5, 4164020), (7, 2974300), (10, 2082010), (14, 1487150), (20, 1041005), (25, 832804), (28, 743575), (35, 594860), (49, 424900), (50, 416402), (70, 297430), (98, 212450), (100, 208201), (140, 148715), (175, 118972), (196, 106225), (245, 84980), (343, 60700), (350, 59486), (490, 42490), (607, 34300), (686, 30350), (700, 29743), (980, 21245), (1214, 17150), (1225, 16996), (1372, 15175), (1715, 12140), (2428, 8575), (2450, 8498), (3035, 6860), (3430, 6070), (4249, 4900)]