18971320

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1213}}^1$

素因数の和:1264

約数の個数: 64

約数和(自身を含む): 47200320

約数和(自身を除く): 28229000

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1213, 1564, 1955, 2426, 3128, 3910, 4852, 6065, 7820, 9704, 12130, 15640, 20621, 24260, 27899, 41242, 48520, 55798, 82484, 103105, 111596, 139495, 164968, 206210, 223192, 278990, 412420, 474283, 557980, 824840, 948566, 1115960, 1897132, 2371415, 3794264, 4742830, 9485660, 18971320]

約数ペア:

[(1, 18971320), (2, 9485660), (4, 4742830), (5, 3794264), (8, 2371415), (10, 1897132), (17, 1115960), (20, 948566), (23, 824840), (34, 557980), (40, 474283), (46, 412420), (68, 278990), (85, 223192), (92, 206210), (115, 164968), (136, 139495), (170, 111596), (184, 103105), (230, 82484), (340, 55798), (391, 48520), (460, 41242), (680, 27899), (782, 24260), (920, 20621), (1213, 15640), (1564, 12130), (1955, 9704), (2426, 7820), (3128, 6065), (3910, 4852)]