18885990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:405

約数の個数: 64

約数和(自身を含む): 47941632

約数和(自身を除く): 29055642

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 101, 115, 138, 202, 230, 271, 303, 345, 505, 542, 606, 690, 813, 1010, 1355, 1515, 1626, 2323, 2710, 3030, 4065, 4646, 6233, 6969, 8130, 11615, 12466, 13938, 18699, 23230, 27371, 31165, 34845, 37398, 54742, 62330, 69690, 82113, 93495, 136855, 164226, 186990, 273710, 410565, 629533, 821130, 1259066, 1888599, 3147665, 3777198, 6295330, 9442995, 18885990]

約数ペア:

[(1, 18885990), (2, 9442995), (3, 6295330), (5, 3777198), (6, 3147665), (10, 1888599), (15, 1259066), (23, 821130), (30, 629533), (46, 410565), (69, 273710), (101, 186990), (115, 164226), (138, 136855), (202, 93495), (230, 82113), (271, 69690), (303, 62330), (345, 54742), (505, 37398), (542, 34845), (606, 31165), (690, 27371), (813, 23230), (1010, 18699), (1355, 13938), (1515, 12466), (1626, 11615), (2323, 8130), (2710, 6969), (3030, 6233), (4065, 4646)]