81780440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4001}}^1$

素因数の和:4092

約数の個数: 64

約数和(自身を含む): 213226560

約数和(自身を除く): 131446120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 1022, 1460, 2044, 2555, 2920, 4001, 4088, 5110, 8002, 10220, 16004, 20005, 20440, 28007, 32008, 40010, 56014, 80020, 112028, 140035, 160040, 224056, 280070, 292073, 560140, 584146, 1120280, 1168292, 1460365, 2044511, 2336584, 2920730, 4089022, 5841460, 8178044, 10222555, 11682920, 16356088, 20445110, 40890220, 81780440]

約数ペア:

[(1, 81780440), (2, 40890220), (4, 20445110), (5, 16356088), (7, 11682920), (8, 10222555), (10, 8178044), (14, 5841460), (20, 4089022), (28, 2920730), (35, 2336584), (40, 2044511), (56, 1460365), (70, 1168292), (73, 1120280), (140, 584146), (146, 560140), (280, 292073), (292, 280070), (365, 224056), (511, 160040), (584, 140035), (730, 112028), (1022, 80020), (1460, 56014), (2044, 40010), (2555, 32008), (2920, 28007), (4001, 20440), (4088, 20005), (5110, 16004), (8002, 10220)]