18265840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:290

約数の個数: 80

約数和(自身を含む): 45666720

約数和(自身を除く): 27400880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 197, 244, 304, 305, 380, 394, 488, 610, 760, 788, 976, 985, 1159, 1220, 1520, 1576, 1970, 2318, 2440, 3152, 3743, 3940, 4636, 4880, 5795, 7486, 7880, 9272, 11590, 12017, 14972, 15760, 18544, 18715, 23180, 24034, 29944, 37430, 46360, 48068, 59888, 60085, 74860, 92720, 96136, 120170, 149720, 192272, 228323, 240340, 299440, 456646, 480680, 913292, 961360, 1141615, 1826584, 2283230, 3653168, 4566460, 9132920, 18265840]

約数ペア:

[(1, 18265840), (2, 9132920), (4, 4566460), (5, 3653168), (8, 2283230), (10, 1826584), (16, 1141615), (19, 961360), (20, 913292), (38, 480680), (40, 456646), (61, 299440), (76, 240340), (80, 228323), (95, 192272), (122, 149720), (152, 120170), (190, 96136), (197, 92720), (244, 74860), (304, 60085), (305, 59888), (380, 48068), (394, 46360), (488, 37430), (610, 29944), (760, 24034), (788, 23180), (976, 18715), (985, 18544), (1159, 15760), (1220, 14972), (1520, 12017), (1576, 11590), (1970, 9272), (2318, 7880), (2440, 7486), (3152, 5795), (3743, 4880), (3940, 4636)]