19799978128

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{251473}}^1$

素因数の和:251544

約数の個数: 80

約数和(自身を含む): 47397819520

約数和(自身を除く): 27597841392

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 37, 38, 56, 74, 76, 112, 133, 148, 152, 259, 266, 296, 304, 518, 532, 592, 703, 1036, 1064, 1406, 2072, 2128, 2812, 4144, 4921, 5624, 9842, 11248, 19684, 39368, 78736, 251473, 502946, 1005892, 1760311, 2011784, 3520622, 4023568, 4777987, 7041244, 9304501, 9555974, 14082488, 18609002, 19111948, 28164976, 33445909, 37218004, 38223896, 65131507, 66891818, 74436008, 76447792, 130263014, 133783636, 148872016, 176785519, 260526028, 267567272, 353571038, 521052056, 535134544, 707142076, 1042104112, 1237498633, 1414284152, 2474997266, 2828568304, 4949994532, 9899989064, 19799978128]

約数ペア:

[(1, 19799978128), (2, 9899989064), (4, 4949994532), (7, 2828568304), (8, 2474997266), (14, 1414284152), (16, 1237498633), (19, 1042104112), (28, 707142076), (37, 535134544), (38, 521052056), (56, 353571038), (74, 267567272), (76, 260526028), (112, 176785519), (133, 148872016), (148, 133783636), (152, 130263014), (259, 76447792), (266, 74436008), (296, 66891818), (304, 65131507), (518, 38223896), (532, 37218004), (592, 33445909), (703, 28164976), (1036, 19111948), (1064, 18609002), (1406, 14082488), (2072, 9555974), (2128, 9304501), (2812, 7041244), (4144, 4777987), (4921, 4023568), (5624, 3520622), (9842, 2011784), (11248, 1760311), (19684, 1005892), (39368, 502946), (78736, 251473)]