18021220

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 96

約数和(自身を含む): 45964800

約数和(自身を除く): 27943580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 71, 74, 98, 140, 142, 148, 185, 196, 245, 259, 284, 343, 355, 370, 490, 497, 518, 686, 710, 740, 980, 994, 1036, 1295, 1372, 1420, 1715, 1813, 1988, 2485, 2590, 2627, 3430, 3479, 3626, 4970, 5180, 5254, 6860, 6958, 7252, 9065, 9940, 10508, 12691, 13135, 13916, 17395, 18130, 18389, 24353, 25382, 26270, 34790, 36260, 36778, 48706, 50764, 52540, 63455, 69580, 73556, 91945, 97412, 121765, 126910, 128723, 183890, 243530, 253820, 257446, 367780, 487060, 514892, 643615, 901061, 1287230, 1802122, 2574460, 3604244, 4505305, 9010610, 18021220]

約数ペア:

[(1, 18021220), (2, 9010610), (4, 4505305), (5, 3604244), (7, 2574460), (10, 1802122), (14, 1287230), (20, 901061), (28, 643615), (35, 514892), (37, 487060), (49, 367780), (70, 257446), (71, 253820), (74, 243530), (98, 183890), (140, 128723), (142, 126910), (148, 121765), (185, 97412), (196, 91945), (245, 73556), (259, 69580), (284, 63455), (343, 52540), (355, 50764), (370, 48706), (490, 36778), (497, 36260), (518, 34790), (686, 26270), (710, 25382), (740, 24353), (980, 18389), (994, 18130), (1036, 17395), (1295, 13916), (1372, 13135), (1420, 12691), (1715, 10508), (1813, 9940), (1988, 9065), (2485, 7252), (2590, 6958), (2627, 6860), (3430, 5254), (3479, 5180), (3626, 4970)]