19739895

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{251}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 37231488

約数和(自身を除く): 17491593

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 107, 147, 245, 251, 321, 535, 735, 749, 753, 1255, 1605, 1757, 2247, 3745, 3765, 5243, 5271, 8785, 11235, 12299, 15729, 26215, 26355, 26857, 36897, 61495, 78645, 80571, 134285, 184485, 187999, 402855, 563997, 939995, 1315993, 2819985, 3947979, 6579965, 19739895]

約数ペア:

[(1, 19739895), (3, 6579965), (5, 3947979), (7, 2819985), (15, 1315993), (21, 939995), (35, 563997), (49, 402855), (105, 187999), (107, 184485), (147, 134285), (245, 80571), (251, 78645), (321, 61495), (535, 36897), (735, 26857), (749, 26355), (753, 26215), (1255, 15729), (1605, 12299), (1757, 11235), (2247, 8785), (3745, 5271), (3765, 5243)]