278721240

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{449}}^1\times {\mathrm{739}}^1$

素因数の和:1209

約数の個数: 128

約数和(自身を含む): 959040000

約数和(自身を除く): 680318760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 449, 739, 840, 898, 1347, 1478, 1796, 2217, 2245, 2694, 2956, 3143, 3592, 3695, 4434, 4490, 5173, 5388, 5912, 6286, 6735, 7390, 8868, 8980, 9429, 10346, 10776, 11085, 12572, 13470, 14780, 15519, 15715, 17736, 17960, 18858, 20692, 22170, 25144, 25865, 26940, 29560, 31038, 31430, 37716, 41384, 44340, 47145, 51730, 53880, 62076, 62860, 75432, 77595, 88680, 94290, 103460, 124152, 125720, 155190, 188580, 206920, 310380, 331811, 377160, 620760, 663622, 995433, 1327244, 1659055, 1990866, 2322677, 2654488, 3318110, 3981732, 4645354, 4977165, 6636220, 6968031, 7963464, 9290708, 9954330, 11613385, 13272440, 13936062, 18581416, 19908660, 23226770, 27872124, 34840155, 39817320, 46453540, 55744248, 69680310, 92907080, 139360620, 278721240]

約数ペア:

[(1, 278721240), (2, 139360620), (3, 92907080), (4, 69680310), (5, 55744248), (6, 46453540), (7, 39817320), (8, 34840155), (10, 27872124), (12, 23226770), (14, 19908660), (15, 18581416), (20, 13936062), (21, 13272440), (24, 11613385), (28, 9954330), (30, 9290708), (35, 7963464), (40, 6968031), (42, 6636220), (56, 4977165), (60, 4645354), (70, 3981732), (84, 3318110), (105, 2654488), (120, 2322677), (140, 1990866), (168, 1659055), (210, 1327244), (280, 995433), (420, 663622), (449, 620760), (739, 377160), (840, 331811), (898, 310380), (1347, 206920), (1478, 188580), (1796, 155190), (2217, 125720), (2245, 124152), (2694, 103460), (2956, 94290), (3143, 88680), (3592, 77595), (3695, 75432), (4434, 62860), (4490, 62076), (5173, 53880), (5388, 51730), (5912, 47145), (6286, 44340), (6735, 41384), (7390, 37716), (8868, 31430), (8980, 31038), (9429, 29560), (10346, 26940), (10776, 25865), (11085, 25144), (12572, 22170), (13470, 20692), (14780, 18858), (15519, 17960), (15715, 17736)]