398762980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:626

約数の個数: 144

約数和(自身を含む): 1079713152

約数和(自身を除く): 680950172

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 71, 77, 98, 110, 140, 142, 154, 196, 220, 245, 284, 308, 355, 385, 490, 497, 521, 539, 710, 770, 781, 980, 994, 1042, 1078, 1420, 1540, 1562, 1988, 2084, 2156, 2485, 2605, 2695, 3124, 3479, 3647, 3905, 4970, 5210, 5390, 5467, 5731, 6958, 7294, 7810, 9940, 10420, 10780, 10934, 11462, 13916, 14588, 15620, 17395, 18235, 21868, 22924, 25529, 27335, 28655, 34790, 36470, 36991, 38269, 40117, 51058, 54670, 57310, 69580, 72940, 73982, 76538, 80234, 102116, 109340, 114620, 127645, 147964, 153076, 160468, 184955, 191345, 200585, 255290, 258937, 280819, 369910, 382690, 401170, 406901, 510580, 517874, 561638, 739820, 765380, 802340, 813802, 1035748, 1123276, 1294685, 1404095, 1627604, 1812559, 2034505, 2589370, 2808190, 2848307, 3625118, 4069010, 5178740, 5616380, 5696614, 7250236, 8138020, 9062795, 11393228, 14241535, 18125590, 19938149, 28483070, 36251180, 39876298, 56966140, 79752596, 99690745, 199381490, 398762980]

約数ペア:

[(1, 398762980), (2, 199381490), (4, 99690745), (5, 79752596), (7, 56966140), (10, 39876298), (11, 36251180), (14, 28483070), (20, 19938149), (22, 18125590), (28, 14241535), (35, 11393228), (44, 9062795), (49, 8138020), (55, 7250236), (70, 5696614), (71, 5616380), (77, 5178740), (98, 4069010), (110, 3625118), (140, 2848307), (142, 2808190), (154, 2589370), (196, 2034505), (220, 1812559), (245, 1627604), (284, 1404095), (308, 1294685), (355, 1123276), (385, 1035748), (490, 813802), (497, 802340), (521, 765380), (539, 739820), (710, 561638), (770, 517874), (781, 510580), (980, 406901), (994, 401170), (1042, 382690), (1078, 369910), (1420, 280819), (1540, 258937), (1562, 255290), (1988, 200585), (2084, 191345), (2156, 184955), (2485, 160468), (2605, 153076), (2695, 147964), (3124, 127645), (3479, 114620), (3647, 109340), (3905, 102116), (4970, 80234), (5210, 76538), (5390, 73982), (5467, 72940), (5731, 69580), (6958, 57310), (7294, 54670), (7810, 51058), (9940, 40117), (10420, 38269), (10780, 36991), (10934, 36470), (11462, 34790), (13916, 28655), (14588, 27335), (15620, 25529), (17395, 22924), (18235, 21868)]