78400100

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{383}}^1$

素因数の和:509

約数の個数: 72

約数和(自身を含む): 179988480

約数和(自身を除く): 101588380

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 89, 92, 100, 115, 178, 230, 356, 383, 445, 460, 575, 766, 890, 1150, 1532, 1780, 1915, 2047, 2225, 2300, 3830, 4094, 4450, 7660, 8188, 8809, 8900, 9575, 10235, 17618, 19150, 20470, 34087, 35236, 38300, 40940, 44045, 51175, 68174, 88090, 102350, 136348, 170435, 176180, 204700, 220225, 340870, 440450, 681740, 784001, 852175, 880900, 1568002, 1704350, 3136004, 3408700, 3920005, 7840010, 15680020, 19600025, 39200050, 78400100]

約数ペア:

[(1, 78400100), (2, 39200050), (4, 19600025), (5, 15680020), (10, 7840010), (20, 3920005), (23, 3408700), (25, 3136004), (46, 1704350), (50, 1568002), (89, 880900), (92, 852175), (100, 784001), (115, 681740), (178, 440450), (230, 340870), (356, 220225), (383, 204700), (445, 176180), (460, 170435), (575, 136348), (766, 102350), (890, 88090), (1150, 68174), (1532, 51175), (1780, 44045), (1915, 40940), (2047, 38300), (2225, 35236), (2300, 34087), (3830, 20470), (4094, 19150), (4450, 17618), (7660, 10235), (8188, 9575), (8809, 8900)]