20456745

素因数分解:

$3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:146

約数の個数: 64

約数和(自身を含む): 36771840

約数和(自身を除く): 16315095

約数列:

[1, 3, 5, 15, 29, 31, 37, 41, 87, 93, 111, 123, 145, 155, 185, 205, 435, 465, 555, 615, 899, 1073, 1147, 1189, 1271, 1517, 2697, 3219, 3441, 3567, 3813, 4495, 4551, 5365, 5735, 5945, 6355, 7585, 13485, 16095, 17205, 17835, 19065, 22755, 33263, 36859, 43993, 47027, 99789, 110577, 131979, 141081, 166315, 184295, 219965, 235135, 498945, 552885, 659895, 705405, 1363783, 4091349, 6818915, 20456745]

約数ペア:

[(1, 20456745), (3, 6818915), (5, 4091349), (15, 1363783), (29, 705405), (31, 659895), (37, 552885), (41, 498945), (87, 235135), (93, 219965), (111, 184295), (123, 166315), (145, 141081), (155, 131979), (185, 110577), (205, 99789), (435, 47027), (465, 43993), (555, 36859), (615, 33263), (899, 22755), (1073, 19065), (1147, 17835), (1189, 17205), (1271, 16095), (1517, 13485), (2697, 7585), (3219, 6355), (3441, 5945), (3567, 5735), (3813, 5365), (4495, 4551)]