1991103680

素因数分解:

$2^6\times 5^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1\times {\mathrm{647}}^1$

素因数の和:886

約数の個数: 112

約数和(自身を含む): 4858755840

約数和(自身を除く): 2867652160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 160, 163, 236, 295, 320, 326, 472, 590, 647, 652, 815, 944, 1180, 1294, 1304, 1630, 1888, 2360, 2588, 2608, 3235, 3260, 3776, 4720, 5176, 5216, 6470, 6520, 9440, 9617, 10352, 10432, 12940, 13040, 18880, 19234, 20704, 25880, 26080, 38173, 38468, 41408, 48085, 51760, 52160, 76346, 76936, 96170, 103520, 105461, 152692, 153872, 190865, 192340, 207040, 210922, 305384, 307744, 381730, 384680, 421844, 527305, 610768, 615488, 763460, 769360, 843688, 1054610, 1221536, 1526920, 1538720, 1687376, 2109220, 2443072, 3053840, 3077440, 3374752, 4218440, 6107680, 6222199, 6749504, 8436880, 12215360, 12444398, 16873760, 24888796, 31110995, 33747520, 49777592, 62221990, 99555184, 124443980, 199110368, 248887960, 398220736, 497775920, 995551840, 1991103680]

約数ペア:

[(1, 1991103680), (2, 995551840), (4, 497775920), (5, 398220736), (8, 248887960), (10, 199110368), (16, 124443980), (20, 99555184), (32, 62221990), (40, 49777592), (59, 33747520), (64, 31110995), (80, 24888796), (118, 16873760), (160, 12444398), (163, 12215360), (236, 8436880), (295, 6749504), (320, 6222199), (326, 6107680), (472, 4218440), (590, 3374752), (647, 3077440), (652, 3053840), (815, 2443072), (944, 2109220), (1180, 1687376), (1294, 1538720), (1304, 1526920), (1630, 1221536), (1888, 1054610), (2360, 843688), (2588, 769360), (2608, 763460), (3235, 615488), (3260, 610768), (3776, 527305), (4720, 421844), (5176, 384680), (5216, 381730), (6470, 307744), (6520, 305384), (9440, 210922), (9617, 207040), (10352, 192340), (10432, 190865), (12940, 153872), (13040, 152692), (18880, 105461), (19234, 103520), (20704, 96170), (25880, 76936), (26080, 76346), (38173, 52160), (38468, 51760), (41408, 48085)]