211234520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{223}}^1$

素因数の和:457

約数の個数: 128

約数和(自身を含む): 580608000

約数和(自身を除く): 369373480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 140, 170, 199, 223, 238, 280, 340, 398, 446, 476, 595, 680, 796, 892, 952, 995, 1115, 1190, 1393, 1561, 1592, 1784, 1990, 2230, 2380, 2786, 3122, 3383, 3791, 3980, 4460, 4760, 5572, 6244, 6766, 6965, 7582, 7805, 7960, 8920, 11144, 12488, 13532, 13930, 15164, 15610, 16915, 18955, 23681, 26537, 27064, 27860, 30328, 31220, 33830, 37910, 44377, 47362, 53074, 55720, 62440, 67660, 75820, 88754, 94724, 106148, 118405, 132685, 135320, 151640, 177508, 189448, 212296, 221885, 236810, 265370, 310639, 355016, 443770, 473620, 530740, 621278, 754409, 887540, 947240, 1061480, 1242556, 1508818, 1553195, 1775080, 2485112, 3017636, 3106390, 3772045, 5280863, 6035272, 6212780, 7544090, 10561726, 12425560, 15088180, 21123452, 26404315, 30176360, 42246904, 52808630, 105617260, 211234520]

約数ペア:

[(1, 211234520), (2, 105617260), (4, 52808630), (5, 42246904), (7, 30176360), (8, 26404315), (10, 21123452), (14, 15088180), (17, 12425560), (20, 10561726), (28, 7544090), (34, 6212780), (35, 6035272), (40, 5280863), (56, 3772045), (68, 3106390), (70, 3017636), (85, 2485112), (119, 1775080), (136, 1553195), (140, 1508818), (170, 1242556), (199, 1061480), (223, 947240), (238, 887540), (280, 754409), (340, 621278), (398, 530740), (446, 473620), (476, 443770), (595, 355016), (680, 310639), (796, 265370), (892, 236810), (952, 221885), (995, 212296), (1115, 189448), (1190, 177508), (1393, 151640), (1561, 135320), (1592, 132685), (1784, 118405), (1990, 106148), (2230, 94724), (2380, 88754), (2786, 75820), (3122, 67660), (3383, 62440), (3791, 55720), (3980, 53074), (4460, 47362), (4760, 44377), (5572, 37910), (6244, 33830), (6766, 31220), (6965, 30328), (7582, 27860), (7805, 27064), (7960, 26537), (8920, 23681), (11144, 18955), (12488, 16915), (13532, 15610), (13930, 15164)]