17820978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 24756942

約数列:

[1, 2, 3, 6, 7, 14, 21, 41, 42, 79, 82, 123, 131, 158, 237, 246, 262, 287, 393, 474, 553, 574, 786, 861, 917, 1106, 1659, 1722, 1834, 2751, 3239, 3318, 5371, 5502, 6478, 9717, 10349, 10742, 16113, 19434, 20698, 22673, 31047, 32226, 37597, 45346, 62094, 68019, 72443, 75194, 112791, 136038, 144886, 217329, 225582, 424309, 434658, 848618, 1272927, 2545854, 2970163, 5940326, 8910489, 17820978]

約数ペア:

[(1, 17820978), (2, 8910489), (3, 5940326), (6, 2970163), (7, 2545854), (14, 1272927), (21, 848618), (41, 434658), (42, 424309), (79, 225582), (82, 217329), (123, 144886), (131, 136038), (158, 112791), (237, 75194), (246, 72443), (262, 68019), (287, 62094), (393, 45346), (474, 37597), (553, 32226), (574, 31047), (786, 22673), (861, 20698), (917, 19434), (1106, 16113), (1659, 10742), (1722, 10349), (1834, 9717), (2751, 6478), (3239, 5502), (3318, 5371)]