81910556

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 144

約数和(自身を含む): 199487232

約数和(自身を除く): 117576676

約数列:

[1, 2, 4, 7, 13, 14, 17, 26, 28, 31, 34, 49, 52, 61, 62, 68, 91, 98, 119, 122, 124, 182, 196, 217, 221, 238, 244, 364, 403, 427, 434, 442, 476, 527, 637, 793, 806, 833, 854, 868, 884, 1037, 1054, 1274, 1519, 1547, 1586, 1612, 1666, 1708, 1891, 2074, 2108, 2548, 2821, 2989, 3038, 3094, 3172, 3332, 3689, 3782, 4148, 5551, 5642, 5978, 6076, 6188, 6851, 7259, 7378, 7564, 10829, 11102, 11284, 11956, 13237, 13481, 13702, 14518, 14756, 19747, 21658, 22204, 24583, 25823, 26474, 26962, 27404, 29036, 32147, 38857, 39494, 43316, 47957, 49166, 50813, 51646, 52948, 53924, 64294, 77714, 78988, 92659, 94367, 95914, 98332, 101626, 103292, 128588, 155428, 172081, 185318, 188734, 191828, 203252, 225029, 335699, 344162, 370636, 377468, 417911, 450058, 660569, 671398, 688324, 835822, 900116, 1204567, 1321138, 1342796, 1575203, 1671644, 2409134, 2642276, 2925377, 3150406, 4818268, 5850754, 6300812, 11701508, 20477639, 40955278, 81910556]

約数ペア:

[(1, 81910556), (2, 40955278), (4, 20477639), (7, 11701508), (13, 6300812), (14, 5850754), (17, 4818268), (26, 3150406), (28, 2925377), (31, 2642276), (34, 2409134), (49, 1671644), (52, 1575203), (61, 1342796), (62, 1321138), (68, 1204567), (91, 900116), (98, 835822), (119, 688324), (122, 671398), (124, 660569), (182, 450058), (196, 417911), (217, 377468), (221, 370636), (238, 344162), (244, 335699), (364, 225029), (403, 203252), (427, 191828), (434, 188734), (442, 185318), (476, 172081), (527, 155428), (637, 128588), (793, 103292), (806, 101626), (833, 98332), (854, 95914), (868, 94367), (884, 92659), (1037, 78988), (1054, 77714), (1274, 64294), (1519, 53924), (1547, 52948), (1586, 51646), (1612, 50813), (1666, 49166), (1708, 47957), (1891, 43316), (2074, 39494), (2108, 38857), (2548, 32147), (2821, 29036), (2989, 27404), (3038, 26962), (3094, 26474), (3172, 25823), (3332, 24583), (3689, 22204), (3782, 21658), (4148, 19747), (5551, 14756), (5642, 14518), (5978, 13702), (6076, 13481), (6188, 13237), (6851, 11956), (7259, 11284), (7378, 11102), (7564, 10829)]