278220880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{21601}}^1$

素因数の和:21644

約数の個数: 80

約数和(自身を含む): 771450624

約数和(自身を除く): 493229744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2576, 3220, 6440, 12880, 21601, 43202, 86404, 108005, 151207, 172808, 216010, 302414, 345616, 432020, 496823, 604828, 756035, 864040, 993646, 1209656, 1512070, 1728080, 1987292, 2419312, 2484115, 3024140, 3477761, 3974584, 4968230, 6048280, 6955522, 7949168, 9936460, 12096560, 13911044, 17388805, 19872920, 27822088, 34777610, 39745840, 55644176, 69555220, 139110440, 278220880]

約数ペア:

[(1, 278220880), (2, 139110440), (4, 69555220), (5, 55644176), (7, 39745840), (8, 34777610), (10, 27822088), (14, 19872920), (16, 17388805), (20, 13911044), (23, 12096560), (28, 9936460), (35, 7949168), (40, 6955522), (46, 6048280), (56, 4968230), (70, 3974584), (80, 3477761), (92, 3024140), (112, 2484115), (115, 2419312), (140, 1987292), (161, 1728080), (184, 1512070), (230, 1209656), (280, 993646), (322, 864040), (368, 756035), (460, 604828), (560, 496823), (644, 432020), (805, 345616), (920, 302414), (1288, 216010), (1610, 172808), (1840, 151207), (2576, 108005), (3220, 86404), (6440, 43202), (12880, 21601)]