19988150

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:246

約数の個数: 96

約数和(自身を含む): 47996928

約数和(自身を除く): 28008778

約数列:

[1, 2, 5, 7, 10, 13, 14, 23, 25, 26, 35, 46, 50, 65, 70, 91, 115, 130, 161, 175, 182, 191, 230, 299, 322, 325, 350, 382, 455, 575, 598, 650, 805, 910, 955, 1150, 1337, 1495, 1610, 1910, 2093, 2275, 2483, 2674, 2990, 4025, 4186, 4393, 4550, 4775, 4966, 6685, 7475, 8050, 8786, 9550, 10465, 12415, 13370, 14950, 17381, 20930, 21965, 24830, 30751, 33425, 34762, 43930, 52325, 57109, 61502, 62075, 66850, 86905, 104650, 109825, 114218, 124150, 153755, 173810, 219650, 285545, 307510, 399763, 434525, 571090, 768775, 799526, 869050, 1427725, 1537550, 1998815, 2855450, 3997630, 9994075, 19988150]

約数ペア:

[(1, 19988150), (2, 9994075), (5, 3997630), (7, 2855450), (10, 1998815), (13, 1537550), (14, 1427725), (23, 869050), (25, 799526), (26, 768775), (35, 571090), (46, 434525), (50, 399763), (65, 307510), (70, 285545), (91, 219650), (115, 173810), (130, 153755), (161, 124150), (175, 114218), (182, 109825), (191, 104650), (230, 86905), (299, 66850), (322, 62075), (325, 61502), (350, 57109), (382, 52325), (455, 43930), (575, 34762), (598, 33425), (650, 30751), (805, 24830), (910, 21965), (955, 20930), (1150, 17381), (1337, 14950), (1495, 13370), (1610, 12415), (1910, 10465), (2093, 9550), (2275, 8786), (2483, 8050), (2674, 7475), (2990, 6685), (4025, 4966), (4186, 4775), (4393, 4550)]