21049203815

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{509}}^1\times {\mathrm{3307}}^1$

素因数の和:3923

約数の個数: 32

約数和(自身を含む): 26358937920

約数和(自身を除く): 5309734105

約数列:

[1, 5, 41, 61, 205, 305, 509, 2501, 2545, 3307, 12505, 16535, 20869, 31049, 104345, 135587, 155245, 201727, 677935, 1008635, 1273009, 1683263, 6365045, 8270807, 8416315, 41354035, 69013783, 102679043, 345068915, 513395215, 4209840763, 21049203815]

約数ペア:

[(1, 21049203815), (5, 4209840763), (41, 513395215), (61, 345068915), (205, 102679043), (305, 69013783), (509, 41354035), (2501, 8416315), (2545, 8270807), (3307, 6365045), (12505, 1683263), (16535, 1273009), (20869, 1008635), (31049, 677935), (104345, 201727), (135587, 155245)]