81315440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{877}}^1$

素因数の和:970

約数の個数: 80

約数和(自身を含む): 202501920

約数和(自身を除く): 121186480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 61, 76, 80, 95, 122, 152, 190, 244, 304, 305, 380, 488, 610, 760, 877, 976, 1159, 1220, 1520, 1754, 2318, 2440, 3508, 4385, 4636, 4880, 5795, 7016, 8770, 9272, 11590, 14032, 16663, 17540, 18544, 23180, 33326, 35080, 46360, 53497, 66652, 70160, 83315, 92720, 106994, 133304, 166630, 213988, 266608, 267485, 333260, 427976, 534970, 666520, 855952, 1016443, 1069940, 1333040, 2032886, 2139880, 4065772, 4279760, 5082215, 8131544, 10164430, 16263088, 20328860, 40657720, 81315440]

約数ペア:

[(1, 81315440), (2, 40657720), (4, 20328860), (5, 16263088), (8, 10164430), (10, 8131544), (16, 5082215), (19, 4279760), (20, 4065772), (38, 2139880), (40, 2032886), (61, 1333040), (76, 1069940), (80, 1016443), (95, 855952), (122, 666520), (152, 534970), (190, 427976), (244, 333260), (304, 267485), (305, 266608), (380, 213988), (488, 166630), (610, 133304), (760, 106994), (877, 92720), (976, 83315), (1159, 70160), (1220, 66652), (1520, 53497), (1754, 46360), (2318, 35080), (2440, 33326), (3508, 23180), (4385, 18544), (4636, 17540), (4880, 16663), (5795, 14032), (7016, 11590), (8770, 9272)]