638860145

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:446

約数の個数: 64

約数和(自身を含む): 985374720

約数和(自身を除く): 346514575

約数列:

[1, 5, 7, 11, 35, 53, 55, 77, 131, 239, 265, 371, 385, 583, 655, 917, 1195, 1441, 1673, 1855, 2629, 2915, 4081, 4585, 6943, 7205, 8365, 10087, 12667, 13145, 18403, 20405, 31309, 34715, 48601, 50435, 63335, 76373, 88669, 92015, 139337, 156545, 219163, 243005, 344399, 381865, 443345, 534611, 696685, 975359, 1095815, 1659377, 1721995, 2410793, 2673055, 4876795, 8296885, 11615639, 12053965, 18253147, 58078195, 91265735, 127772029, 638860145]

約数ペア:

[(1, 638860145), (5, 127772029), (7, 91265735), (11, 58078195), (35, 18253147), (53, 12053965), (55, 11615639), (77, 8296885), (131, 4876795), (239, 2673055), (265, 2410793), (371, 1721995), (385, 1659377), (583, 1095815), (655, 975359), (917, 696685), (1195, 534611), (1441, 443345), (1673, 381865), (1855, 344399), (2629, 243005), (2915, 219163), (4081, 156545), (4585, 139337), (6943, 92015), (7205, 88669), (8365, 76373), (10087, 63335), (12667, 50435), (13145, 48601), (18403, 34715), (20405, 31309)]