17921720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1$

素因数の和:288

約数の個数: 64

約数和(自身を含む): 42336000

約数和(自身を除く): 24414280

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 97, 124, 149, 155, 194, 248, 298, 310, 388, 485, 596, 620, 745, 776, 970, 1192, 1240, 1490, 1940, 2980, 3007, 3880, 4619, 5960, 6014, 9238, 12028, 14453, 15035, 18476, 23095, 24056, 28906, 30070, 36952, 46190, 57812, 60140, 72265, 92380, 115624, 120280, 144530, 184760, 289060, 448043, 578120, 896086, 1792172, 2240215, 3584344, 4480430, 8960860, 17921720]

約数ペア:

[(1, 17921720), (2, 8960860), (4, 4480430), (5, 3584344), (8, 2240215), (10, 1792172), (20, 896086), (31, 578120), (40, 448043), (62, 289060), (97, 184760), (124, 144530), (149, 120280), (155, 115624), (194, 92380), (248, 72265), (298, 60140), (310, 57812), (388, 46190), (485, 36952), (596, 30070), (620, 28906), (745, 24056), (776, 23095), (970, 18476), (1192, 15035), (1240, 14453), (1490, 12028), (1940, 9238), (2980, 6014), (3007, 5960), (3880, 4619)]