81457740

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4973}}^1$

素因数の和:5008

約数の個数: 144

約数和(自身を含む): 304170048

約数和(自身を除く): 222712308

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1365, 1638, 1820, 2340, 2730, 3276, 4095, 4973, 5460, 8190, 9946, 14919, 16380, 19892, 24865, 29838, 34811, 44757, 49730, 59676, 64649, 69622, 74595, 89514, 99460, 104433, 129298, 139244, 149190, 174055, 179028, 193947, 208866, 223785, 258596, 298380, 313299, 323245, 348110, 387894, 417732, 447570, 452543, 522165, 581841, 626598, 646490, 696220, 775788, 895140, 905086, 969735, 1044330, 1163682, 1253196, 1292980, 1357629, 1566495, 1810172, 1939470, 2088660, 2262715, 2327364, 2715258, 2909205, 3132990, 3878940, 4072887, 4525430, 5430516, 5818410, 6265980, 6788145, 8145774, 9050860, 11636820, 13576290, 16291548, 20364435, 27152580, 40728870, 81457740]

約数ペア:

[(1, 81457740), (2, 40728870), (3, 27152580), (4, 20364435), (5, 16291548), (6, 13576290), (7, 11636820), (9, 9050860), (10, 8145774), (12, 6788145), (13, 6265980), (14, 5818410), (15, 5430516), (18, 4525430), (20, 4072887), (21, 3878940), (26, 3132990), (28, 2909205), (30, 2715258), (35, 2327364), (36, 2262715), (39, 2088660), (42, 1939470), (45, 1810172), (52, 1566495), (60, 1357629), (63, 1292980), (65, 1253196), (70, 1163682), (78, 1044330), (84, 969735), (90, 905086), (91, 895140), (105, 775788), (117, 696220), (126, 646490), (130, 626598), (140, 581841), (156, 522165), (180, 452543), (182, 447570), (195, 417732), (210, 387894), (234, 348110), (252, 323245), (260, 313299), (273, 298380), (315, 258596), (364, 223785), (390, 208866), (420, 193947), (455, 179028), (468, 174055), (546, 149190), (585, 139244), (630, 129298), (780, 104433), (819, 99460), (910, 89514), (1092, 74595), (1170, 69622), (1260, 64649), (1365, 59676), (1638, 49730), (1820, 44757), (2340, 34811), (2730, 29838), (3276, 24865), (4095, 19892), (4973, 16380), (5460, 14919), (8190, 9946)]