20578790

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{683}}^1$

素因数の和:844

約数の個数: 32

約数和(自身を含む): 39004416

約数和(自身を除く): 18425626

約数列:

[1, 2, 5, 10, 23, 46, 115, 131, 230, 262, 655, 683, 1310, 1366, 3013, 3415, 6026, 6830, 15065, 15709, 30130, 31418, 78545, 89473, 157090, 178946, 447365, 894730, 2057879, 4115758, 10289395, 20578790]

約数ペア:

[(1, 20578790), (2, 10289395), (5, 4115758), (10, 2057879), (23, 894730), (46, 447365), (115, 178946), (131, 157090), (230, 89473), (262, 78545), (655, 31418), (683, 30130), (1310, 15709), (1366, 15065), (3013, 6830), (3415, 6026)]