20016100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 47575080

約数和(自身を除く): 27558980

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 89, 100, 130, 173, 178, 260, 325, 346, 356, 445, 650, 692, 865, 890, 1157, 1300, 1730, 1780, 2225, 2249, 2314, 3460, 4325, 4450, 4498, 4628, 5785, 8650, 8900, 8996, 11245, 11570, 15397, 17300, 22490, 23140, 28925, 30794, 44980, 56225, 57850, 61588, 76985, 112450, 115700, 153970, 200161, 224900, 307940, 384925, 400322, 769850, 800644, 1000805, 1539700, 2001610, 4003220, 5004025, 10008050, 20016100]

約数ペア:

[(1, 20016100), (2, 10008050), (4, 5004025), (5, 4003220), (10, 2001610), (13, 1539700), (20, 1000805), (25, 800644), (26, 769850), (50, 400322), (52, 384925), (65, 307940), (89, 224900), (100, 200161), (130, 153970), (173, 115700), (178, 112450), (260, 76985), (325, 61588), (346, 57850), (356, 56225), (445, 44980), (650, 30794), (692, 28925), (865, 23140), (890, 22490), (1157, 17300), (1300, 15397), (1730, 11570), (1780, 11245), (2225, 8996), (2249, 8900), (2314, 8650), (3460, 5785), (4325, 4628), (4450, 4498)]