19992750

素因数分解:

$2^1\times 3^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:123

約数の個数: 128

約数和(自身を含む): 55710720

約数和(自身を除く): 35717970

約数列:

[1, 2, 3, 5, 6, 10, 15, 19, 23, 25, 30, 38, 46, 50, 57, 61, 69, 75, 95, 114, 115, 122, 125, 138, 150, 183, 190, 230, 250, 285, 305, 345, 366, 375, 437, 475, 570, 575, 610, 690, 750, 874, 915, 950, 1150, 1159, 1311, 1403, 1425, 1525, 1725, 1830, 2185, 2318, 2375, 2622, 2806, 2850, 2875, 3050, 3450, 3477, 4209, 4370, 4575, 4750, 5750, 5795, 6555, 6954, 7015, 7125, 7625, 8418, 8625, 9150, 10925, 11590, 13110, 14030, 14250, 15250, 17250, 17385, 21045, 21850, 22875, 26657, 28975, 32775, 34770, 35075, 42090, 45750, 53314, 54625, 57950, 65550, 70150, 79971, 86925, 105225, 109250, 133285, 144875, 159942, 163875, 173850, 175375, 210450, 266570, 289750, 327750, 350750, 399855, 434625, 526125, 666425, 799710, 869250, 1052250, 1332850, 1999275, 3332125, 3998550, 6664250, 9996375, 19992750]

約数ペア:

[(1, 19992750), (2, 9996375), (3, 6664250), (5, 3998550), (6, 3332125), (10, 1999275), (15, 1332850), (19, 1052250), (23, 869250), (25, 799710), (30, 666425), (38, 526125), (46, 434625), (50, 399855), (57, 350750), (61, 327750), (69, 289750), (75, 266570), (95, 210450), (114, 175375), (115, 173850), (122, 163875), (125, 159942), (138, 144875), (150, 133285), (183, 109250), (190, 105225), (230, 86925), (250, 79971), (285, 70150), (305, 65550), (345, 57950), (366, 54625), (375, 53314), (437, 45750), (475, 42090), (570, 35075), (575, 34770), (610, 32775), (690, 28975), (750, 26657), (874, 22875), (915, 21850), (950, 21045), (1150, 17385), (1159, 17250), (1311, 15250), (1403, 14250), (1425, 14030), (1525, 13110), (1725, 11590), (1830, 10925), (2185, 9150), (2318, 8625), (2375, 8418), (2622, 7625), (2806, 7125), (2850, 7015), (2875, 6954), (3050, 6555), (3450, 5795), (3477, 5750), (4209, 4750), (4370, 4575)]